OK, this is an underground cistern, a large chamber supported by numerous pillars, once used to store water. It's now been turned into a tourist attraction by the addition of several walkways, artificial red uplights, and piped in atmospheric music (and a cafe!). Aside from the uniform pillars, there are only a couple of interesting sculptures - two stone medusa... more

This is a very unique attraction. You venture underground to see an area which used to provide water to Istanbul. There are beautiful columns lit up in a beautiful red light. The two Medusa heads are at the end of the cistern and are very interesting. We spent a little less than 30 minutes down there, but definitely enjoyed it.... more

I reiterate that the Cistern is worth a visit. Not only is it easy to go to, since it is near other major attractions, but it is definitely one of the more unique things to see. The pillars look incredibly cool though photo buffs may want to bring a tripod for the low light environment. Like other attractions in Istanbul,... more

Worth the visit, beautiful and interesting place. Very nice when it's hot outside, always fresh down there. more

I read about the cistern on Trip Advisor and I agree that it is worthwhile to visit. We rented the audio guide but it did not give much information. Suggest you save your money and just read up on it before or after the visit! The entrance fee was TYL 10 but EUR 7. It works out much cheaper by... more

This was really "cool". Peaceful and beautiful. Probably my favorite attraction in Istanbul. Highly recommended. more

go there on a very hot day, to feel the coolness of the underground water, it's amazing that you could walk around, don't forget to look at the big head upside down. And do what is done for at least 1000years throw money for good fortune. Don't get fooled by the little entrance at streetlevel and take your time. It's... more

Don't know what I was expecting, but walked in and said 'wow' very atmospheric and well worth a visit more

Go there to explore a magical underworld. Cool when its hot outside, quiet, when you have enough of Istanbul traffic. The best is to go during the weekdays or out of season. The Cistern is most beautyful, when only less people are around. more