You might want to spend some time browsing the exhibits at Alexander Pushkin Museum and Memorial Apartment, Erarta Museum and Galleries of Contemporary Art, or Russian Museum. 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.