Zarafona Castle is a good sample of late medieval fortification architecture. It is in relatively good condition According to an inscription found on the west external wall, the castle was constructed in the period that the Despotate of Moreas was governed by Theodoros II Paleologos (1407-1448). Therefore it was a construction of the first half of the 15th century, part of the effort of the Byzantines to confront the Ottoman threat.
The castle has an almost trapezoid layout and covers an area of 745 square meters. There are 3 towers, two at the west wind and two at the east. The walls are divided in 5 straight parts of vertical walls.
The central tower is much higher than the other buildings and the walls. It has 3 levels. The ground-floor houses a 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.