You might want to spend some time browsing the exhibits at Russian Museum, Faberge Museum, or State Museum of Theatre and Music. Great Gostiny Dvor, St. Michael's Castle, and Alexandrinsky Theatre are landmarks that you won't want to miss. You can watch performances at Bolshoi Saint Petersburg State Circus, Oktyabrskiy Big Concert Hall, and Mariinsky Theatre if you're interested in local theater.