At the top of the existing beach at Bagh an Da Dhoruis there is a raised beach with a long dry marine cave system. It was probably 10,000 years ago that the sea last surged through these subterranean channels.
We were staggered by the scale of the place as we soon lost sight of each other...
..in the maze of interconnecting caverns. In some, prehistoric shell mounds reveal the eating habits of our ancestors.
Unfortunately for our further exploration, the sun was now dipping fast to the western horizon. We still had an open crossing of 11km to reach our destination. We returned to the shore through yet another cave system on this incredible north shore of Islay.