You might want to spend some time browsing the exhibits at Museum of the Defense and Siege of Leningrad, Blockade Museum, or Faberge Museum. First Engineer Bridge, Beloselsky-Belozersky Palace, and Dostoyevsky Museum are notable landmarks to explore if you're in the area. You can watch performances at Oktyabrskiy Big Concert Hall, St. Petersburg Philharmonia, and Alexandrinsky Theatre if you're interested in local theater.