Great Masson Cavern is one of two caves at the

Heights of Abraham The Heights of Abraham is a tourist attraction in Matlock Bath, Derbyshire, England. It consists of a hilltop park on top of Masson Hill, accessed from the village by the Heights of Abraham cable car. The heights are named after a supposed res ...

Matlock Bath Matlock Bath is a village and civil parish in Derbyshire, England. It lies in the Derbyshire Dales, south of Matlock on the main A6 road, and approximately halfway between Buxton and Derby. The population of the civil parish at the 2011 census ...

Derbyshire Derbyshire ( ) is a ceremonial county in the East Midlands of England. It borders Greater Manchester, West Yorkshire, and South Yorkshire to the north, Nottinghamshire to the east, Leicestershire to the south-east, Staffordshire to the south a ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

. The other is

Great Rutland Cavern Great Rutland Cavern is one of two caves at the Heights of Abraham, Matlock, Derbyshire Derbyshire ( ) is a ceremonial county in the East Midlands of England. It borders Greater Manchester, West Yorkshire, and South Yorkshire to the north, ...

Great Masson Cavern is notable for its lack of

stalactite A stalactite (, ; , ) is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines. Any material that is soluble and that can be deposited as a colloid, or is in suspension (chemistry ...

s and

stalagmite A stalagmite (, ; ; ) is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings. Stalagmites are typically composed of calcium carbonate, but may consist ...

s, as the cave is coated in a

clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impuriti ...

-like substance that inhibits deposition. However, it still has some rock formations such as "the Owl" and "the Rabbit". It was first opened to visitor viewing in Victorian times and had been mined for

fluorspar Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon. The Mohs scal ...

prior to the opening to visitors.Peak District Mines Historical Society
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References

Caves of Derbyshire Show caves in the United Kingdom {{Derbyshire-geo-stub