I took a bus from Huaraz and arrived at Barranca city's roadside around 4pm so I have to stay one night here. There are frequent collectivos at calle Berenice Davila as early as 7am for 8 soles and it will reach Puente Caral after 45 minutes. It's another 15 minutes walk after the bridge and you will reach the visitor center and the ticket booth. It's 11 soles for foreigners and you have to pay maximum 20 soles for the guided tour. I arrived early that day around 9am so I had to wait another hour for other visitors to share the guide fee. During the wait you can go through the signboards of Caral's history and facts, then you can visit the souvenir shops.

There were finally 7 of us who decided to share the guide fee, so each of us paid around 3 soles for it. The more people the less you pay. The guided tour is all in Spanish, for those who are not fluent in Spanish (like me) can look at the bilingual signboard in front of the ruins to get a picture of what's the usage and what was discovered. The whole tour is under the sun with no cover at all, so make sure to put on sunscreen or wear a hat. It's windy and chilly sometimes so a wind proof jacket will do. 

The whole tour takes around 1 hour. Make sure you go to toilet situated at the entrance before or after the tour as there's no toilet at the archaeological site. It's not allowed to go into the ruins so one can only see from far. The restoration work is still on going so you might see some places covered with plastic or have black flags on it.