You'll want to browse the collections at Bunker Museum, Kaliningrad Regional Museum of History and Arts, and B-413 Submarine Museum. Explore notable local landmarks like Ruins of Koenigsberg castle, Honey Bridge, and Amber Museum. You can watch performances at Kaliningrad Regional Drama Theatre, Kaliningrad Regional Youth Theater for Young Spectators, and Kaliningrad Regional Philharmonic Hall if you're interested in local theater.