Geograph - photograph every grid square

Calder's Geo is a chasm-like inlet on the western coast of Esha Ness, just to the north of the lighthouse. As can be seen, the tide was out when I took this shot, so the full impressive depth of the drop could be seen. According to the map, a subterranean passage runs northwestwards from about halfway along the far wall through to the sea on the other side.