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. Explore landmarks like St. Nicholas' Naval Cathedral, Saint Petersburg Conservatory, and Yusupov Palace. You can watch performances at Mariinsky Theatre, Rimsky-Korsakov Conservatory, and Alexandrinsky Theatre if you're interested in local theater.