Defence Line of Amsterdam

Defence Line of Amsterdam

The Defence Line of Amsterdam was built between 1883 and 1920 to guard the capital Amsterdam. It is the only example of a fortification based on the control of water.

The protection of the centre of the country was ensured by a network of 45 forts and their artillery acting in concert with temporary flooding from polders and an intricate system of canals and locks.

Map of Defence Line of Amsterdam

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Visit October 2002

For my visit to the Defense Line I chose Muiden and Pampus, two of the most accessible locations. Muiden is a historical fortress-town to the east of Amsterdam. The whole town is like an open air museum and has a real historical feel to it. The Muiden Castle is also a must.

October 2002

From Muiden I took the ferry to Pampus. This island became the final part of the Defense Line: it had to guard the entrance to Amsterdam via the IJ-river. Soldiers were trained here between the two World Wars, but never has the island been used in combat. The place was already outdated when its construction had finished.

October 2002

Nowadays Pampus sees 35.000 visitors a year. Since 1990 it has been privately owned by a foundation that wants to maintain and restore the fortress-island. They haven't been lucky in finding funds though, and so the site is in really bad repair. Not as bad however as when they acquired it twelve years ago, when there were rats everywhere and trees grew out of the buildings.

October 2002

Community Reviews

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Thibault Magnien

France - 20-Nov-16 -

Defence Line of Amsterdam by Thibault Magnien

I have visited this WHS in September 2016. The Defence line of Amsterdam symbolises the engineering skills of the people from the Netherlands in water management. It also illustrates the spirit and atmosphere existing in Western Europe in the late 18th and early 19th centuries when most of countries were facing internal tensions as well as external pressures, increasing the likelihood of the occurence of a war and making necessary to all countries to erect defence lines and fortifications.

I have visited forts in Weesp, Muiden, Abcoude, Hinderdam and Nekkerweg. Other forts will come during my next trips to the Netherlands.

Jay T

USA - 11-Oct-15 -

Defence Line of Amsterdam by Jay T

Because I had limited time in and around Amsterdam when visiting in 2014, I concentrated on a section of the Defense Line just outside Haarlem, which included Fort Liebrug and Fort Penningsveer. The walk to the forts was scenic, bypassing a recreation area on the west side of the Liede River. Both forts are on the east bank of the Liede. Fort Liebrug was closed, so I only got to see it from the road, but Fort Penningsveer was open on a Thursday afternoon in the summer. Fort Penningsveer is tree-covered and surrounded by a moat, and has several earth-covered bunkers and trails to explore. I encountered a youth camp unexpectedly on the back side of the fort, but I later found out on the Defence Line of Amsterdam website that the fort is being used for educational camps. The forts weren't the most breathtaking World Heritage Sites I've seen, but they were a pleasant way to spend a summer afternoon.

Logistics: Train to Haarlem Spaarnwoude station (near Haarlem IKEA); walking path to the east bank of the Liede River to find both Fort Liebrug and Fort Penningsveer.


Japan / USA / Poland - 16-Jan-15 -

Defence Line of Amsterdam by tsunami

Since I was in Essen, Germany, visiting the Zolverein WHS, on 17/12, I thought I would go to Amsterdam just for one night on 18/12 to attend a concert at the Gebouw for the first time. But because I had been to Amsterdam once before, instead of roaming the city before the concert, I thought I'd go check out another World Heritage site, the Amsterdam Defense Circle. It was a last minute decision, meaning I was not well-prepared. Once in Amsterdam I just walked into a tourist office, and a staff there recommended the city of Naarden to see part of the circle, showing me the impressive aerial photo of the city.

So I went to Naarden, and it was fascinating to learn at the defense museum how the people in the low lands in Netherlands naturally came up with the idea of using water to defend themselves.

But then after the concert in my hotel I checked the UNESCO website and started wondering if Naarden is really part of the WHS, despite the fact that a staff at the museum specifically told me that the whole town of Naarden was a part of that WHS.

Because of my suspicion I quickly decided to visit the fortress at Weesp in the early next morning before my train departs from Amsterdam Central at 9 am. From the Weesp train station, I walked in the rain to the fortress at 7 am in the early morning winter darkness.

By now I know that Naarden is not part of the WHS but is included in the tentative New Holland Waterline.


Malta - 07-Sep-12 -

Defence Line of Amsterdam by Clyde

I visited this WHS several times but I remember in December 2010 the canals were totally frozen! This defence system based on the principle of controlling the waters is quite unique and well worth a visit by boat (perhaps when the canals are not frozen!)

Klaus Freisinger

Austria - 05-Jul-11 -

This is a pretty interesting and unique site, but one that is a bit challenging to visit. It consists of over 30 separate sites within a 15 to 20-km radius around Amsterdam, all in various states of repair, with many not accessible to the public. The highlight is the small (artificial) island of Pampus in the IJsselmeer, which can be reached by ferry from Muiden. The military and civilian installations there are still very impressive and give a good idea of what life was like for the soldiers stationed there (it was only fully staffed during WW I). The guided tours seem to be in Dutch only, but you can get a map and walk around on your own. The pretty port city of Muiden has a nice maritime atmosphere and features, besides the interesting Muiden Castle, another part of the WHS - the Muizenfort, which includes some well-preserved trenches. The West Battery is directly opposite the castle and can be seen from the ferry (it would be a very long walk there). In the nearby town of Weesp (where the buses to Muiden leave), I went to see the Fort aan de Ossenmarkt, which looks quite impressive and well-preserved from the outside, but can't be visited. These sites are all southeast of Amsterdam and seem to be the ones that can be visited most easily. After my visit to Beemster (north of A'dam), I went to the nearby town of Edam, which is most famous for its cheese-making tradition. The Fort bij Edam can be reached in a (very) long walk from the centre. It is only open on selected days (first and second Sundays of each month from April to October, and afternoons only), because it is run and staffed by volunteers. It is not in a very good shape, but it was still interesting to walk around in the dark alleys and small exhibition rooms. Apart from Amsterdam's canal area, this was the most interesting WHS I have yet seen in the Netherlands.

John booth

New Zealand - 06-May-10 -

Defence Line of Amsterdam by John Booth

Although a number of the forts were closed I did manage to visit a few of them:

Aalsmeer fort - got a guided tour from the curator of the museum here, saw the facilities provided for the troops stationed here virtually undergound and enclosed in a massive reinforced concrete structure (train to Schiphol Airport then bus #198 to Aalsmeerdenbrug).

Fort Uitermeer - a circular fort (train to Weesp then bus #106 to Rondelvrugt.

Vesting Weesp - a circular fort (train to Weesp)

Muiden Slot - has more an appearance of a stately home or castle than a defence installation (by bus from Weesp).

Pampus Island - the ferry ride from Muiden included an extensive guided tour of the fort.

Amstelhoek fort - by bus #142 from Amsterdam Centraal to Tienboerenweg, Uithoorn.

Fort an der Drecht - now a restaurant, winery and art studio (bus #170 from Uithoorn).

Fort Vijfhuizen - now an art centre (by bus #140 from Uithoorn to Hoofddorp then bus #300).

Fort Veldhuis and Fort an der Ham - found these on a hike along the dykes from Heemskerk (bus #167 from Beverwijk station) to Krommenie-Assendelft station.

Kevin Verboven

Belgium - 01-Mar-09 -

Some friends of mine invited me to go to Amsterdam with them. Since I had seen Amsterdam before, I decided to visit the defense line. Our stay wasn’t going to be long and I was going to rely on public transportion. So I decided to search on the internet which parts of the defense line were the easiest to reach from the city. Combining the world heritage website, google maps, some others and this very excellent site on the defense line (in Dutch and English) I choose the following fortresses:

- Fort aan de Ossenmarkt (Weesp)

- All the fortresses in the town of Muiden

- Fort bij Penningsveer (Haarlemmerliede)

- Fort aan den Ham (Uitgeest)

First I took the train from Amsterdam Central station to Weesp Station (+/- 15 min) and from there I took the bus to Muiden (stop brandweerkazerne: +/- 10 minutes). There I saw the complex of sluices, the westbattery, Muizenfort and I also visited the nicely preserved Muiderslot (which I can recommend taking some time for). Unfortunatly the boat to Pampus didn’t sail out this season, so I could only glimpse it from the shores of the Ijssel lake.

The thing I liked most here was the west battery, I found it to be an intruiging structure. Unfortunatly I could only see it from outside, as the inside seems to be used for youth organisations. The muizenfort contains a museum, but this too was closed. Muiden is a nice town though with a nice maritime feel to it. And thank heavens for the zoom on my camera so I atleast had a decent picture of Pampus.

I took the bus back to Weesp and had to walk about 1 km from the station to come across “Fort aan de Ossenmarkt”. A somewhat similar building to the westbattery in Muiden, though it seems to have stood the test of time in a better way. This fort is also not open to visitors and can only be viewed from the outside. After +/-15 minutes with the train I stood back in Amsterdam.

The next day I took the train to Krommenie-Assendelft station (+/- 25 minutes, all trains are direct from Amsterdam). And I seem to come out in the middle of nowhere, along a seemingly major road. The station was quite modern though. From Google maps I knew I had to walk about 2 km. This had to be over the cycling facilities since they were no facilities for pedestrians. I had to admit, I didn’t feel quite safe, walking alone on that long road in what seemed the middle of nowhere (just a long road, some polders and town centres in the difference). Eventually I arrived at the fort (aan den Ham), you can see it from a distance, but the gates are closed. It opens up like once a month. Not the greatest thing I ever saw, though it’s considerably bigger then the ones in Muiden and Weesp.

Back to Amsterdam with the train (the one I didn’t miss by a minute) and from there I took the train again to Haarlem-Spaarnwoude (+/- 13 minutes). When you’re nearing the station you can glimpse another fort from out the window of the train. The station (another modern one) is nearby an Ikea store and after walking over the huge parking area and following the map I had I came into a nature reserve (Spaarnwoude I believe it’s called). Which was a bit disorienting, especially since google maps seems to have troubles with such areas. Fortunatly 2 friendly Dutch ladies pointed out the right way for me. It seemed a much longer walk then Google indicated (1 km). I walked around the moat of the fort (Penningsveer), but all you saw was some trees, a hill and here and there some small manmade stuff.

I reached the front, where some information signs stand and another closed gate. One of the signs reading you can book entrance. I admired the fortress from behind the gates (so you don’t see much) and turned back to the train station. I returned to Amsterdam, and went shopping with my friends. One should always make time for shopping ;-).

Ian Cade

UK - 26-Jul-06 -

Defence Line of Amsterdam by Ian Cade

The forts ring Amsterdam so if you travel about 15km out from the centre you will be pretty close to one of them.

After a recommendation from Els we headed out to Muiden. There are two forts here as well as a ferry link to a third at Pampus. We first stopped at the Muiden fort near the lock at the centre of town. Having looked at the forts in aerial photos this was the classic shape of the majority of the forts, it is a sort of arrowhead shape surrounded by a moat. We had a look inside but most of the things were closed, there was information leaflets about the other forts along the New Holland Waterline (on the Dutch tentative list).

We then walked out to the West battery (pictured), here you could get a better overview of the fort and its ring of water, it is now used as a meeting place for scouts. It was very hot so we went to the extremely small beach behind the battery and relaxed with the locals, looking out towards the fortress island of Pampus.

Muiden was an exceedingly charming place to visit and the castle is very impressive, we had a lovely time here sitting in the café next to the lock watching the boats move past. It was worth making the short trip out, there are hourly buses to and from Amsterdam Amstelstation and it takes about 30 minutes.

We saw three of the forts at Beemster, the one at Spijkerboor is open to visitors and has explanations about how the forts work, it was closed when we got there though. When you are taking off/landing at Schiphol keep an eye out as a fair few of the sites are located almost literally at the ends of the runways, I managed to see two more like this.

It is quite hard to grasp entirely how these forts work, and as they are so disparate I never really got a full sense of their worth. The engineering is impressive and it is a distinctly Dutch interpretation of defence. As a casual tourist I wouldn’t suggest the sites themselves are really worth trekking out to see but are wide spread so a visit to many places just outside Amsterdam should give you a chance to view at least one of them.

Site Info

Full Name
Defence Line of Amsterdam
Unesco ID
2 4 5
Secular structure - Military and Fortifications

Site History

1996 Inscribed


The site has 45 locations

Defence Line of Amsterdam: Fort Near Edam Edam-Volendam (NH), Netherlands
Defence Line of Amsterdam: Fort Near Kwadijk (never completed) Zeevang (NH), Netherlands
Defence Line of Amsterdam: Fort north of Purmerend Beemster (NH), Netherlands
Defence Line of Amsterdam: Fort along Nekkerweg Beemster (NH), Netherlands
Defence Line of Amsterdam: Fort along Middenweg Beemster (NH), Netherlands
Defence Line of Amsterdam: Fort along Jisperweg Beemster (NH), Netherlands
Defence Line of Amsterdam: Fort near Spijkerboor Beemster (NH), Netherlands
Defence Line of Amsterdam: Fort near Marken-Binnen Uitgeest (NH), Netherlands
Defence Line of Amsterdam: Fort near Krommeniedijk Uitgeest (NH), Netherlands
Defence Line of Amsterdam: Fort along de Ham Zaanstad (NH), Netherlands
Defence Line of Amsterdam: Fort near Veldhuis Heemskerk (NH), Netherlands
Defence Line of Amsterdam: Fort along the St. Aagtendijk Beverwijk (NH), Netherlands
Defence Line of Amsterdam: Fort Zuidwijkermeer Beverwijk (NH), Netherlands
Defence Line of Amsterdam: Fort near Velsen Beverwijk (NH), Netherlands
Defence Line of Amsterdam: Coastal Fort near Ijmuiden Velsen (NH), Netherlands
Defence Line of Amsterdam: Fort north of Spaardam Velsen (NH), Netherlands
Defence Line of Amsterdam: Fort south of Spaardam Haarlem (NH), Netherlands
Defence Line of Amsterdam: Fort near Penningsveer Haarlemmerliede (NH), Netherlands
Defence Line of Amsterdam: Fort near the Liebrug Haarlemmerliede (NH), Netherlands
Defence Line of Amsterdam: Fort de Liede Haarlemmerliede (NH), Netherlands
Defence Line of Amsterdam: Fort Bij Heemstede Haarlemmermeer (NH), Netherlands
Defence Line of Amsterdam: Advanced defense at Vijfhuizen Haarlemmermeer (NH), Netherlands
Defence Line of Amsterdam: Fort near Vijfhuizen Haarlemmermeer (NH), Netherlands
Defence Line of Amsterdam: Battery along Ijweg Haarlemmermeer (NH), Netherlands
Defence Line of Amsterdam: Fort near Hoofddorp Haarlemmermeer (NH), Netherlands
Defence Line of Amsterdam: Battery along Sloterweg Haarlemmermeer (NH), Netherlands
Defence Line of Amsterdam: Fort near Aalsmeer Haarlemmermeer (NH), Netherlands
Defence Line of Amsterdam: Fort near Kudelstaart Aalsmeer (NH), Netherlands
Defence Line of Amsterdam: Fort near de Kwakel Uithoorn (NH), Netherlands
Defence Line of Amsterdam: Fort along the Drecht Uithoorn (NH), Netherlands
Defence Line of Amsterdam: Fort near Uithoorn De Ronde Venen (UT), Netherlands
Defence Line of Amsterdam: Fort near Wavel-Amstel De Ronde Venen (UT), Netherlands
Defence Line of Amsterdam: Fort in the Waver-Botshol (never completed) Abcoude (UT), Netherlands
Defence Line of Amsterdam: Fort along De Winkel (never completed) Abcoude (UT), Netherlands
Defence Line of Amsterdam: Fort near Abcoude Abcoude (UT), Netherlands
Defence Line of Amsterdam: Fort near Nigtevecht Abcoude (UT), Netherlands
Defence Line of Amsterdam: Fort near Hinderdam Weesp (NH), Netherlands
Defence Line of Amsterdam: Fort Uitermeer Weesp (NH), Netherlands
Defence Line of Amsterdam: Weesp Fortress - Defensive tower on the Ossenmarket Weesp (NH), Netherlands
Defence Line of Amsterdam: Muiden Fortress Muiden (NH), Netherlands
Defence Line of Amsterdam: Muiden west battery Muiden (NH), Netherlands
Defence Line of Amsterdam: Fort Kijkuit 's-Graveland (NH), Netherlands
Defence Line of Amsterdam: Battery near the IJ before Diemerdam Diemen (NH), Netherlands
Defence Line of Amsterdam: Fort along the Pampus Muiden (NH), Netherlands
Defence Line of Amsterdam: Battery near the IJ before Durgerdam Amsterdam (NH), Netherlands


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A. Mehmet Haksever Adam Hancock Adrian Lakomy Alberto Peterle Alessandro Votta Alexander Barabanov Alexander Lehmann Alfons and Riki Verstraeten Ali Zingstra Alias65 Allan Berry & Lucia Cerón Escobar Anne_Mellow Argo Arianna Artur Anuszewski Artworks Asegelman Atcardamone Atila Ege Aurelien Drilant-Abenascad Bas Bgbaum Bin Bob Finnie Bob Parda BobSmithseestheworld Boj Bram de Bruin Brigitte Huber Buffy CAN SARICA Carlos Aniés Carlos Garrido Carstenhansen Cat and Paula Cezar Grozavu Cheryl Chris Lee Christer Sundberg Christian Ochse ClaireWhiteley Clem C Clyde Colin Colossus Coppi Craig Harder Cristina Erba DAB DMORMAR DMORMAR Dachangjin3 Daniel Chazad Daniela Hohmann David Berlanda David Samuel Santos Davied Dean Swift Dennis Dgjohansson Diana van Nieuwkoop Diggy Dimitar Krastev Dirk-pieter Donald M Parrish Jr Donia Dpottenr Echwel Elias Eliazer Cohen Elisabeth Fransisca Situmorang Ellen Nielsen Els Slots Enrique Clemente Erik Jelinek Esther Westerveld Eva Kisgyorgy Fan Yibo FedeCambo Felicite Fairer-Wessels Felix Femke Roos Fool79 Foxhill Frederik Dawson Fuaron Gary Arndt Geert Luiken Geo Gill Colman Glibit Gretell Scott Grimloch Gustavo Leit Hadas Midbari Haining Guan Handballrama Hannes Muehlbacher Herunen Homadism Hubert Hurrvinek IC Iain Jackson Ian Cade Ilya Burlak Inigo Cia Ivan Rucek J?rg-Bernd Bonekamp Jacob Choi Jakob Frenzel Jan Zimmermann Jan-Willem Janina Lehmann Janis Jarek Pokrzywnicki Javier Coro Jay T Jbaker0811 Jean Lecaillon Jean-Philippe Platroz Jeanne OGrady Jenni Jens Jessica Rademacher Jgera Jiang Jiang Joebobs Joel Baldwin John booth Johnson Zhao Jon Eshuijs Jonas Hagung Jonas Kremer Jonathanfr Jordi Martinez Jorge fitzmaurice Jos Baars Jos Schmitz Jose Antonio Collar Joyce van Soest Judith Tanner Karen Kasia M. Kbecq Kelly Henry Kevin Verboven Kjlchiang Klaus Freisinger Koen Vliegenthart Krijn Lantian Lara Adler Larahartog Lars Gunnar Gardo Le Yang Lei Liu Leontine Helleman Lois Dekker Londonium Lonny Steeghs Lorenzo Mejino Lucia Ludvan Luis Filipe Gaspar Luisfreire Lukasz Palczewski MH MHasuly MMM MaYumin Maarten Hoek Maciej Gowin Marcel Benard Marie Morlon Mariellex55 Mariska Markus Marlies van Wolfswinkel Marta Lempert Martina Librio Martina Ruckova Marty Massimiliano croce MaxHeAnou Meredith Carter Mibive Michael Mett Michael Novins Michael Rohde Michael Turtle Michal Kozok Michiel Dekker Mikael Bjork Mike Mikko Mirjam S. Misio_pysio Monika and Rini Naim Y Nan Nevin Salman Nick Kuzmyak Nicole Kilian Nihal Ege Ninalr Okke Omnisppot Oscar PabloNorte Parrot Pascal Cauliez Patphilly Patty Verhoeven Paul Schofield Paula Paulino Michelazzo Peter Alleblas Peter Loov PeterA PeterH Petteri Philipp Peterer Pressdm Proxy Randi Thomsen Roger Ourset Roman Koeln Roman Raab Ronald Lange Ronaldo Michels Rosen Rswood Rudegirl Rvedda Rwestervelt3 Ryan Oliver Sabrina Liebehentschel Salla Sam Begley Sam Mason Sandersx2 Saxondean Sazanami Schnitzel Sergio Arjona Shaka_schulz Shandos Cleaver Sharon Cheung Shirley Xue SirLoydd Sjboyd Smeets Peter Sncjob Solivagant Stanimir Stanislaw Warwas SteO153 Stephanvermeulen Stetrab Steven Strogan Svermeulen Szucs Tamas Tamara Ratz Tatiana Nikulnikova Ted Coombs Teebs The Salmons Thibault Magnien Thijs van den Berg Thomas Buechler Thomas van der Walt Thorben Tony0001 Topaas Tram2net Truls Brekke Tsunami Vanessa Buechler Veelineen Vicente B. Avanzado Jr. Virp Vladimir WILLIAM RICH WalGra Walter Walter H. Wang Qin Watkinstravel Werner Huber Widy Heuver Willem van Altena Wolfgang Sander Xangadib Xiquinho Silva YaroMir Yi Han Goh Zhenjun Liu Zoë Sheng