You might want to spend some time browsing the exhibits at C-189 Submarine Museum, Erarta Museum and Galleries of Contemporary Art, or Pushkin Flat-Museum. St. Nicholas' Naval Cathedral, Saint Petersburg Conservatory, and Yusupov Palace are landmarks that you won't want to miss. You can check out the local talent at Mariinsky Theatre, Alexandrinsky Theatre, and Oktyabrskiy Big Concert Hall.