Calder's Geo is a large geo that cuts into the western cliffs of Esha Ness. To the north of the geo is sea cave that has been measured at more than one and a half times the size of "Hidden Deep" - a chamber in Reservoir Hole under Cheddar Gorge in Somerset, potentially making it the largest natural chamber in Britain.
Esha Ness Lighthouse just south of Calder's Geo was designed by David Alan Stevenson and commissioned in 1929. The power of the Atlantic Ocean storms is displayed at Grind o Da Navir, a large amphitheatre just north of the Eshaness light that opens out through a breach in the cliffs. Here, the waves have thrown rocks of up to 3 metres (9.8 ft) high over 15 metres (49 ft) above the sea.