The Grey Cairns of Camster are two large Neolithic chambered cairns in the Highland region of Scotland. They are among the oldest buildings in Scotland, dating to about 5,000 years ago. The cairns demonstrate the complexity of Neolithic architecture, with central burial chambers accessed through narrow passages from the outside. They were excavated and restored by Historic Scotland in the late 20th century and are open to the public.
The cairns, which are considered to be examples of the Orkney-Cromarty type of chambered cairn, were constructed in the third or fourth millennium BC in a desolate stretch of boggy peat-covered moorland in the Flow Country of Caithness. They consist of two structures standing 180 m apart, known as Camster Round and Camster Long. A third cairn, located about 120 metres away from Camster Round, is not considered to be part of the grouping. Although the surrounding countryside is now inhospitable and sparsely inhabited, during the Stone Age it was fertile farming land and only became covered in peat during the Bronze Age.
Camster Long is a 60 m long cairn with 'horns' at each end. The two chambers appear to have originally been constructed within separate round cairns, which were only later incorporated into a single long cairn for unknown reasons.
Camster Round is, as the name suggests, a circular cairn; it measures 18 metres in diameter by 3.7 metres high. It is virtually intact with a high vaulted chamber at its centre, accessed from a passage 6 metres long and 0.8 metres high at the east-south-east side of the cairn. The passage appears to have been deliberately put out of use by blocking it up with stones piled up to the height of its roof.References:
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.