Magnificent Coca Castle was built in the 15th century by Alonso de Fonseca, a mighty archbishop of Seville, during the reign of King Enrique IV of Castile. It's made up of two square baileys separated by a passageway. Both show polygonal towers at the corners. The double walls are 2.5 m thick and it's circled by a deep dry moat.
Coca castle is a mixture of western and Moorish military architecture, as can be seen from its decoration. It has a square ground plan, a moat and two walled enclosures, which gives it the air of impregnability for which it has been known over the centuries. The keep is located in the second area. It is made of brick and its walls are profusely decorated. The interior is very luxurious and lavish, and conserves its Mudejar decoration. Due to its great splendour, it was used more as a palace than as a fortress. It is one of the crowning works of the military Mudejar style.
The castle is owned by the Alva family and now serves as a training center for foresters. Their school is situated in the inner bailey.
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.