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, Timber Bridge, and Honey Bridge. You can watch performances at Kaliningrad Regional Drama Theatre, Kaliningrad Regional Musical Theatre, and Kaliningrad Regional Youth Theater for Young Spectators if you're interested in local theater.