Aillwee Cave is a cave in the karst landscape of the Burren in County Clare. The name Aillwee is derived from the Irish Aill Bhuí which means “yellow cliff”.
The cave system consists of over a kilometre of passages leading into the heart of the mountain. Its features include an underground river and a waterfall as well as some large stalactites and stalagmites. The remains of bears can also be seen inside the caves and allusions have been made to it being the last bear den in Ireland. Roughly 300 metres (980 ft) of cave passage is open to the public, one third of the total length of the cave. The tours end at a point called the Highway and exit the cave via a 250-metre (820 ft) man-made tunnel. The cave is typical of the Clare caves, consisting in the main of stream passage and ending in a sump. The general direction is east–west but turns due south some 600 metres (2,000 ft) into the cave.
The cave is considerably older than most of the Clare caves and originally contained a large stream. The cave is now largely deserted of the stream and is heavily backfilled with glacial infill. The formations visible on the show cave tour are rarely more than 8000 years old but calcite samples in the recesses of the cave have been dated to over 350,000 years old.
For further information and booking details visit: www.aillweecave.ie/