Louhisaari manor castle was built in the late medieval ages by the remarkable Fleming noble family. The present main building was completed in the 1650s and represents the rare palatial architecture in Finland. The grounds have an extensive English-style park, complete with paths. Louhisaari belonged to the Fleming family for over three hundred years. The lack of money forced them to sell the manor to the family of Mannerheim in 1791. Finland’s Marshall C.G.E. Mannerheim was born there in 1867.
The festive floor and the service floor are in 17th-century style and furnished to match. The middle floor, where the actual living quarters were, was modernised during the 18th and 19th centuries, and the rooms in this part of the castle reflect the interior-decoration styles of that time.
Government of Finland bought Louhisaari in 1961 and opened it to the public couple of years later.
Nowadays it’s open in summer time. Admission to the museum only in the company of a guide, tours in Finnish at half hourly intervals.
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.