You might want to spend some time browsing the exhibits at Kaliningrad Regional Museum of History and Arts, Bunker Museum, or B-413 Submarine Museum. Ruins of Koenigsberg castle, King's Gate, and Amber Museum are well-known local landmarks worth a visit. You can check out the local talent at Kaliningrad Regional Musical Theatre, Kaliningrad Regional Philharmonic Hall, and Kaliningrad Regional Youth Theater for Young Spectators.