Castlecary is like many other settlements in the area tied to the Roman history of Scotland. The route of the Antonine Wall passes close to the village. A Roman camp existed at Castlecary, first constructed around the year 80 AD, possibly during the fourth campaign season of governor Gnaeus Julius Agricola. Excavated in 1902, the Roman fort was probably devastated by the 2nd century.
Castlecary is one of only two forts along the wall to have featured stone ramparts. Visible remains include a low mound and portions of exposed stonework from the fort’s east rampart, small portions of the headquarters building near a cluster of trees within the centre of the fort, and, depending on the current height of grass, traces of stonework at the north gate.
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.