Henkenshage may look like a medieval castle but it is not. Although it was built during the 14th century under the name Hanekenshage it was just a simple building. During the 15th century it was also known under the name Strijpe or Streepen.
In 1748 Henkenshage Castle was sold to Willem, Baron of Haren. In 1801 it was fitted as a convent for Augustinian nuns.
Around 1850 the castle was bought by Pieter J. de Girard de Mielet van Coehoorn. At that time the castle was still a simple manor with no storeys. He had the castle rebuilt by the famous Dutch architect PJH. Cuypers, who also rebuilt De Haar Castle and built the Rijksmuseum in Amsterdam. Cuypers built the two towers, added a storey, replaced the main entrance to the house from the south to the north side and built the gate building.
In 1940 Henkenshage came into possession of the local government. During WW II it was used as a distribution office and during the liberation in 1944 it was the headquarters of the 101st Airborne Division.
At present the castle is used by a catering company and can not be visited. So, although Henkenshage Castle is not a real medieval castle I think it has a lot of atmosphere.
References:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.