You might want to spend some time browsing the exhibits at Military History Museum of Artillery, Erarta Museum and Galleries of Contemporary Art, or Museum of the Defense and Siege of Leningrad. Explore landmarks like Peter and Paul Fortress, Strelka, and State Hermitage Museum. You can watch performances at Bolshoi Saint Petersburg State Circus, Alexandrinsky Theatre, and Mariinsky Theatre if you're interested in local theater.