You might want to spend some time browsing the exhibits at Anna Akhmatova Literary and Memorial Museum, General Staff Building, or Alexander Pushkin Museum and Memorial Apartment. Admiralty Building, St. Isaac's Cathedral, and State Hermitage Museum are landmarks that you won't want to miss. You can watch performances at Rimsky-Korsakov Conservatory, Mariinsky Theatre, and Alexandrinsky Theatre if you're interested in local theater.