Calders Geo is an inlet in the western cliffs of

Esha Ness Esha Ness, also spelled Eshaness, is a peninsula on the west coast of Northmavine, on the island of Mainland, Shetland, Scotland. Esha Ness Lighthouse on the west coast, just south of Calder's Geo. It was designed by David Alan Stevenson and com ...

in Northmavine on the

Mainland, Shetland The Mainland is the main island of Shetland, Scotland. The island contains Shetland's only burgh, Lerwick, and is the centre of Shetland's ferry and air connections. Geography It has an area of , making it the third-largest Scottish island a ...

, Scotland. A cave on the north side of the geo has been measured at more than one and a half times the size of "The Frozen Deep", a chamber in Reservoir Hole under

Cheddar Gorge Cheddar Gorge is a limestone gorge in the Mendip Hills, near the village of Cheddar, Somerset, England. The gorge is the site of the Cheddar show caves, where Britain's oldest complete human skeleton, Cheddar Man, estimated to be 9,000 years ...

in Somerset, potentially making it the largest natural chamber in Britain. Geologist Jonathan Swale used a laser range-finder to measure the interior of the cave, which is only accessible during calm seas. He claims that the structure is over tall and has a floor area of around .

Esha Ness Lighthouse Eshaness Lighthouse is situated on the Northmavine peninsula in the north-west of the Shetland Islands, Scotland. It sometimes rendered as Esha Ness Lighthouse. The lighthouse has a tapering, square tower high and was built by David Alan St ...

just south of the geo was designed by David Alan Stevenson and commissioned in 1929."Eshaness"
Northern Lighthouse Board. Retrieved 28 August 2014.

References

Caves of Scotland Sea caves Landforms of Shetland Northmavine {{Shetland-geo-stub