If only the walls of Kastelholm Castle could talk! But seeing they can't, check if tours are available to hear a couple of its intriguing tales instead.
This Sund fortified complex is a good place to start your day of sightseeing. There's loads to see close by, like Kastelholms Slott, Bomarsund, and Kvarnbovikens badstrand. Wander around at your leisure at Kastelholm Castle before hitting up these other fine attractions.