The north coast of Islay has some of the most impressive natural features on the island, including many natural arches. This series of natural arches can be found near the big cave at Bholsa, about half way between Mala Bholsa and Rhuvaal.
A picture from an Islay walking week a while ago, walking from Killinallan around the north of Islay to Bunnahabhain. Lunch was outside the caves at Bholsa.
I believe this is the biggest cave on Islay, the big cave at Bholsa in the north of Islay. The people looking around the entrance give an idea how big it is.