C-189 Submarine Museum, Erarta Museum and Galleries of Contemporary Art, and Alexander Pushkin Museum and Memorial Apartment feature a variety of fascinating exhibits to see while you're in town. Sights like Yusupov Palace, Mariinsky Palace, and St. Isaac's Cathedral are must-sees while exploring the area. You can watch performances at Mariinsky Theater Concert Hall, Mariinsky Theatre, and Mikhailovsky Theatre if you're interested in local theater.