Explore enchanting st petersburg by boat on a 2 hour small group sightseeing cruise along the neva river after a short walk down nevsky prospekt the citys most prominent address hop on board your luxury boat and admire all the sights that line st petersburgs romantic waterways see the peter and paul fortress that was built by russian tsar peter the great and see cultural city highlights like mariinsky theatre pass under countless charming bridges and compare different examples of arch