You might want to spend some time browsing the exhibits at Rumyantsev Mansion, C-189 Submarine Museum, or Erarta Museum and Galleries of Contemporary Art. Explore landmarks like Yusupov Palace, St. Petersburg Academy of Fine Arts, and St. Isaac's Cathedral. You can check out the local talent at Mariinsky Theatre, Tovstonogov Bolshoi Drama Theater, and Mikhailovsky Theatre.