The things that make Åland unique are its unspoiled archipelago and the beautiful bedrock, worn smooth by glacier ice, that gets its red color from the area's rapakivi granite. Åland's 6,700 islands have a world to offer where the sea is always nearby. What to do: Military Museum. Aland Maritime Museum. 4.7. Explore. Specialty Museum. Museumship Pommern. 4.5. ... Specialty Museum. Kastelholm Castle. 4.3. ... Historic Site. Bomarsund. 3.9. ... Island. Kobba Klintar. 4.7. ... Park. Lilla holmen. 4.1. ... Nature / Park. Getabergen. 4.7. ... Specialty Museum. Aland Hunting & Fishing Museum. 4.5.