The construction of the Marmionda Castle dates back to the 12th century, shortly after the beginning of the invasion of Al-Andalus by the Almohads (1147), who ended the Almoravid empire. In 1167, it was conquered by the Christian king of León, Fernando II, who handed it over to the Order of the Temple. Almost thirty years later, in 1196, it was recaptured by the Almohads. In 1213, it was definitively reconquered by Alfonso IX of León, who gave it to the Order of San Julian del Pereiro, later known as the Order of Alcántara.
From Visigothic times to the Middle Ages, there was no better defensive element for the inhabitants of the Alagón Valley than this castle. It was a strategically well-positioned fortress, south of Coria and on the way to Cáceres, with a prior passage through the Tajo River valley. Throughout its history, various reforms took place, with the 16th century being the last of some importance. It was abandoned from the second half of the 17th century.
It is of a square base and consists of the following elements: a pair of circular towers, the keep on the northeast side, and a second tower on the northwest side that was recently reconstructed and restored but whose aesthetics disrupt the overall harmony of the ensemble; large walls (curtains) crowned with crenellations with pyramidal tops; a barbican in front of the wall; an extensive courtyard; and a large cistern.
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.