Gösslunda sandstone church has been built around the year 1100. It represents Romanesque architecture and is obviously influenced by English church building style (as well as the near Skalunda Church). Massive walls refer also that church has been constructed for defensive purposes.
There is a unique relief in the tower portal depicting the centaur with Viking helmet and sword. This pagan relief could be made to expel demons out of the church. It has also similarities to reliefs in Anglo-Saxon churches and it can be deduced that Gösslunda Church was made by unknown English master. There are also two runestones, one inside the church and another outside.
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Bomarsund fortress and garrison was built in 1832-1854 by Russian Empire to defence Åland Islands against enemies. British and French fleet attacked against it during the Crimean War in 1854. After a week of fighting the British stormed the remaining fort. Anglo-French forces destroyed it totally after battle. In the Treaty of Paris 1856, the entire Åland Islands were demilitarized, which is a status that has been preserved until this day.
Nowadays there are some ruins left and fortress area is open for visitors.