Sanjusangendo is actually one of the more interesting places in Kyoto. Basically it is a temple with 1000 statues of Buddhist Kannon. The statues aren’t copies of each other and are either from the 12th or 13th centuries. The statues are on platforms of various levels, all facing the viewer. It’s quite an interesting temple and I’ve never been to any similar places.
Unfortunately you’re not allowed to take pictures at all inside the temple and there are signs saying that they will ask to see your camera if you are seen with it, so please don’t try to sneak pictures there if you go.
It is open from 8 AM to 5 PM from April to November 15th and from 9 AM to 4 PM from November 16th to March. It costs 600 yen for adults, 400 yen for high school students, and 300 yen for children. Sanjusangendo is fairly close to Keihan Shichijo station, and can also be reached by buses 100, 206 and 208 from Kyoto station.