You might want to spend some time browsing the exhibits at B-413 Submarine Museum, Museum of the World Ocean, or Amber Museum. Sights like Ruins of Koenigsberg castle, Timber Bridge, and King's Gate are must-sees while exploring the area. You can check out the local talent at Kaliningrad Regional Drama Theatre, Kaliningrad Regional Philharmonic Hall, and Kaliningrad Regional Youth Theater for Young Spectators.