Drysllwyn Castle stands on high ground overlooking the Tywi Valley with extensive views. It was built in about the 1220s by one of the princes of the kingdom of Deheubarth, and changed hands several times in the struggles between the Welsh and English over the ensuing centuries. It is considered one of the most important remaining structures built by a Welsh chieftain.
Drysllwyn was seized by Owain Glyndŵr in the summer of 1403 and when the English forces recaptured it they decommissioned it by blocking various access routes, walling up the gatehouse, removing the treads from stone stairs and even removing the hinges from the main gate. At some later stage, all the major buildings were burned to the ground. Following this a lot of the stone was removed from the site
The polygonal Inner Ward contains principal remains to the south west, with traces of the Middle and Outer Ward to the north east. The early thirteenth century curtain wall to the Inner Ward only stands 1m high. There is a garderobe to the east side, and a remodelled thirteenth century Gatehouse to the north east, surviving at foundation level only. On the south side of the Gatehouse is the Round Tower, the original keep. The foundations of the original Great Hall and Rhys ap Maredudd's hall survive.
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.