Erarta Museum and Galleries of Contemporary Art, C-189 Submarine Museum, and Pushkin Flat-Museum feature a variety of fascinating exhibits to see while you're in town. English Embankment, St. Isaac's Cathedral, and Strelka are monuments to see when you're exploring the area around Menshikov Palace. You can watch performances at Mariinsky Theatre, Alexandrinsky Theatre, and Oktyabrskiy Big Concert Hall if you're interested in local theater.