Visavuori is the museum of the life and works of sculptor Emil Wikström (1864-1942) and his grandson, cartoonist Kari Suomalainen (1920-1999). Wikström built his first wilderness atelier in 1894. It was destroyed by fire in 1896 and the residence, Romantic Nationalism in style, was completed in 1902. The new atelier completed next year and represents the Central European architecture style. The atelier was enlarged in 1912.
Visavuori buildings are very well-preserved with the original interior and furnitures (mostly bought from Paris). Today Visavuori is a museum of temporary art exihibitions.
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.