Treak Cliff Cavern

Image: this pilar is the last remains of a famous Blue John vein. It was necesessary to leave this pillar to insure the stability of the cavern.
Image: here are the typical crinoids, found in the Fossil Cavern.
Image: a detail of crinoids.
Image: some coloured stalactites in the Dream Cave.
Image: a strangely shaped stalagmite, maybe forced by an air current to grow diagonal.
Image: the yellow colour of the speleothems is made by the remains of minerals in the rock.