Alcalatén Castle, located on San Salvador Mountain in the municipality of Alcora, is an Islamic fortress with medieval architectural reforms, built between the 10th and 13th centuries.
In 1233, after the conquest of Borriana, King James I granted the castle and the title of baron to the Aragonese knight Ximén d'Urrea.
The castle, with a triangular layout, covers an area of 150 square meters. It includes a main enclosure surrounded by a patrol path, with a cistern, as well as both abandoned and inhabited areas.
At the highest point, two walls forming a right angle and topped with battlements are preserved, extending into two towers; one circular to the north and one semicircular to the south. A third tower is known to have existed, though only rubble remains from its demolition in the 15th century. The eastern section is completely destroyed. At the base of the citadel, a rectangular cistern made of mortar and stones remains, measuring approximately 4 by 10 meters. The structure is built with masonry.
The entrance is on the south side, featuring two circular towers, battlements, and a barbican-style wall.
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.