It was very exciting when my friend from SPb showed me interesting places there. Unusual pubs, houses, yards, clubs, museums. There are a lot of amazing graffitis, some roofs are very beautiful too. But you really need a guide for this kind of stuff. When i left SPb, my friend still had a lot of things to show me (I've been there for 2 weeks). If you ask about river trips inside the city we never thought about it (for me it looks a bit weird, so i didn't want to waste my time).

The most impressive _well known_ places for me were Peterhof, cathedrals (especially where you can go upstairs and to the roof), Peter and Paul Fortress