You might want to spend some time browsing the exhibits at Grand Maket Russia Interactive Museum, C-189 Submarine Museum, or Erarta Museum and Galleries of Contemporary Art. Narva Triumphal Arch, Saint Petersburg Conservatory, and Yusupov Palace are landmarks that you won't want to miss. You can watch performances at Mariinsky Theatre, Alexandrinsky Theatre, and Bolshoi Saint Petersburg State Circus if you're interested in local theater.