VERLA BOARD MILL
I note the following in Joel Baldwin's review of this WHS - https://www.worldheritagesite.org/list/id/751#userreview_16161"My only real complaint with this site was that photos and videos weren't allowed inside! I'm really not sure why - there isn't delicate painting to be protected, no trade secrets, and it's definitely not crowded enough to be a crowd management issue either. Maybe they've had problems with people filming the tour guides? Either way, we found it strange and it made for a rather difficult video!"
My understanding when we were there and questioned the guide about the "no interior photography" policy is that it is a copyright issue. The WHS is privately owned by the UPM-Kymmene Corporation - https://en.wikipedia.org/wiki/UPM_(company)
See this privacy statement from the Museum's Website demonstrating its ownership - https://www.verla.fi/en/privacystatement
Either they don't want to reduce potential sales of guidebooks and post cards or it is just a standard "corporate" ban in all their sites - operational or not (Most/All private companies would ban interior photography in their operational premises without special permission)
(ELS - I see that we don't yet have it on the "In Private Ownership" Connection.)
I was particularly annoyed that they wouldn't even let me photograph (in close-up!) the UNESCO inscription certificate which hangs on one of the walls and which I normally photograph when seen - one would have thought this "belonged" to the people of Finland!! But the private company seems to insist on asserting its rights. All very different from the sort of "relaxed" attitude which my preconceptions (and experiences) expect of Finns!!