Dun Carloway is one of the best preserved brochs in the Western Isles, with one side of it still reaching a height of nearly 10m.
Inside the 4m thick walls there are still inter-mural passageways and the remains of a staircase which can be climbed.
The broch stands on a small hillock high above Loch an Dùin and commands great views over the landscape below.
It dates from the 1st century BC.