Dun Carloway is one of the best-preserved Iron Age brochs in Scotland — a drystone circular tower built around 100 BC, with walls still standing to 9 metres on one side. Brochs were sophisticated defensive structures unique to Iron Age Scotland; Dun Carloway shows the double-wall construction, internal staircase, and gallery spaces typical of the form, all still clearly legible despite two thousand years of exposure.
The site overlooks East Loch Roag with views across to the hills of Uig. It sits close enough to the Callanish Stones to visit both in a half day. A small visitor centre beside the broch provides context without overwhelming the site.