One of Ireland’s more dramatic ring forts, Cahercommaun all but hangs over the edge of a ravine. Stone arcs within stone arcs enclose a central stronghold with three-metre-thick walls, which in turn enclose an inner sanctum reaching up to 3.5 metres high. The fort would once have been home to an extended family group living off the land. It was excavated in the 1930s. It’s about one kilometre from the road, but well worth the walk - for spectacular views of the wooded valley alone.