Kołobrzeski Skansen Morski

This open-air maritime museum lets you board and explore two real ships built during the communist era, getting a genuine look inside vessels that don't usually open their doors to the public. You can wander through most of the ship except the engine areas, so bring a bit of curiosity and willingness to duck through some tight spaces. It's a surprisingly hands-on experience for a museum, and a cool way to connect with Poland's Baltic naval history right in Kołobrzeg.