Habrahelia, a cavern in Mull Head, at the northern extremity of Papa-Westray island, Orkney. With a width of from 48 to 60 feet, it rises, in a manner resembling an archway, to a height of over 70 feet; is formed, on the sides, by successive projecting strata, with a regularity similar to that of a stair; and has a smooth even floor, slightly ascending from the entrance inward.

(F.H. Groome, Ordnance Gazetteer of Scotland (1882-4); © 2004 Gazetteer for Scotland)