You'll want to browse the collections at B-413 Submarine Museum, Bunker Museum, and Blindage Museum. Ruins of Koenigsberg castle, Brandenburg Gate, and Amber Museum are monuments to see when you're exploring the area around Park of Sculpture. You can watch performances at Kaliningrad Regional Philharmonic Hall, Kaliningrad Regional Youth Theater for Young Spectators, and Art House Concert and Theater Complex if you're interested in local theater.