You might want to spend some time browsing the exhibits at Erarta Museum and Galleries of Contemporary Art, C-189 Submarine Museum, or Cigar Museum. Strelka, St. Petersburg Academy of Fine Arts, and Russian Admiralty are monuments to see when you're exploring the area around Tuchkov Bridge. You can catch a show at Mariinsky Theatre, Alexandrinsky Theatre, and Oktyabrskiy Big Concert Hall.