You might want to spend some time browsing the exhibits at B-413 Submarine Museum, Bunker Museum, or Kaliningrad Regional Museum of History and Arts. Sights like Ruins of Koenigsberg castle, Brandenburg Gate, and Amber Museum are must-sees while exploring the area. You can check out the local talent at Kaliningrad Regional Musical Theatre, Queen Louise Kirsch Puppet Theater, and Kaliningrad Regional Drama Theatre.