At the big cave at Bholsa, Isle of Islay Posted on 4 February 2014 by Armin Grewe 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. Share this picture:EmailWhatsAppTwitterFacebookPinterestTumblrLinkedInReddit You might also like these pictures: