The magnificent ruins of the great O'Brien stronghold of Leamaneh stand on the southern fringe of the limestone wilderness known as the Burren. It is a lonely place and perhaps a surprising location for a splendid four-storey, high-gabled, early seventeenth-century mansion with rows of large mullioned windows.

The early part of the building at the east end is, by contrast, a rather grim five-storey tower (c.1500) with narrow slit openings for windows, a tier of small chambers and a spiral stair.

Its entrance passage, with drawbar holes for inner and outer doors, was probably later reserved for servants, as the gabled mansion had its own front door.

The four-storey mansion was added to the west of the tower in the 1640s.

This monument is visible from the road but not accessible.