Englburg castle lies on a 581-m-high hill near Tittling. The current castle dates from 1396, after it was destroyed by the citizens of Passau and rebuilt. It was again badly damaged by Swedish troops in the Thirty Year's War in 1634. After the fire in 1874 the castle got its current appearance.
Various noble families have owned the Englburg; the last ones were the Lords of Taufkirchen. The landowner family Niedermeier began to renovate the castle in the second half of the 19th century and extend it into a popular destination for excursions. The remains from this time consist of the lookout tower.
Since 2011 carried out a thorough renovation of Englburg, it houses apartments, offices and commercial spaces. The castle is not open to visitors.
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.