You'll want to browse the collections at Kaliningrad Regional Museum of History and Arts, Bunker Museum, and B-413 Submarine Museum. Timber Bridge, Honey Bridge, and Ruins of Koenigsberg castle are notable landmarks to explore if you're in the area. You can watch performances at Queen Louise Kirsch Puppet Theater, Music theatre on Basseynaya, and Kaliningrad Regional Musical Theatre if you're interested in local theater.