Calders Geo is an inlet in the western cliffs ofEsha Ness inNorthmavine on theMainland, Shetland, Scotland. A cave on the north side of thegeo has been measured at more than one and a half times the size of "The Frozen Deep", a chamber inReservoir Hole underCheddar Gorge in Somerset, potentially making it the largest natural chamber inBritain.[1]
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 20 metres (66 ft) tall and has a floor area of around 5,600 square metres (60,000 sq ft).[2]
Esha Ness Lighthouse just south of thegeo was designed byDavid Alan Stevenson and commissioned in 1929.[3]
60°29′27″N1°37′18″W / 60.4907°N 1.6218°W /60.4907; -1.6218
| Populated places |  | |
|---|---|---|
| Geography |
| |
| History | ||
| Buildings | ||
| People | ||
| Inhabited islands | | |
|---|---|---|
| Other islands | ||
| Towns and villages | ||
| Mainland Parishes | ||
| Insular Parishes | ||
| Maritime features | ||
Extreme points
| ||
| Topics | ||
