Sagadi Manor had owned by the von Fock family from the year 1687 to 1922. The current main main building was completed in 1753 and enlarged in 1793. It is one of the rare Rococo-style buildings in Estonia.
The manor house, annexes and the surrounding park have been restored. Today Sagadi hosts a manor museum (the interior has been also carefully restored and refurnished), forestry museum, park and hotel.
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.