The Gärdslösa church is the best preserved medieval church on Öland. The western part of the nave as well as the slightly younger western tower was built during the 12th century and the transept was added around 1240. The main restoration was done in 1845.
There is a votive ship of the Swedish Riksnyckeln, which was blasted in a battle between the Danish and Swedish navies in the Kalmar Strait in 1679. On the model is written the year 1691 and it was most likely given to the church the year after that. The model is fully rigged, but restored several times.References:
La Hougue Bie is a Neolithic ritual site which was in use around 3500 BC. Hougue is a Jèrriais/Norman language word meaning a \'mound\' and comes from the Old Norse word haugr. The site consists of 18.6m long passage chamber covered by a 12.2m high mound. The site was first excavated in 1925 by the Société Jersiaise. Fragments of twenty vase supports were found along with the scattered remains of at least eight individuals. Gravegoods, mostly pottery, were also present. At some time in the past, the site had evidently been entered and ransacked.
In Western Europe, it is one of the largest and best preserved passage graves and the most impressive and best preserved monument of Armorican Passage Grave group. Although they are termed \'passage graves\', they were ceremonial sites, whose function was more similar to churches or cathedrals, where burials were incidental.