The Balaiana Castle is situated on Mount San Leonardo, at 299 metres above sea level, dominating the surrounding valley. You can walk through a staircase carved between granite rocks where the start path is located in the parking area, just 5 km from the village, on the road to Arzachena.
The castle's unique architecture, with features such as the special interlocking blocks of granite corners, dates back to the 12th century. The castle was destroyed by the army of Alfonso of Aragon, who had razed the structure almost completely to the ground in 1442.
The small church dedicated to San Leonardo was built as a chapel of the castle and is a rare example of Romanesque architecture in Gallura. The chapel can be reached via a path just a few dozen metres north of the Castle. The similarity between the churches in Corsica suggests that in the second half of the 12th century there was a shift between the islands of the Mediterranean and the manufacturers who used the granite stone.
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.