Sometimes it's more argumentative than descriptive: 'spray-foam insulation that congealed in grotesque, snotty rivulets reminiscent of limestone cave formations'.

Helictites are, perhaps, the most delicate of cave formations.

However, the guests would often damage the cave formations by taking souvenirs.

Its five halls and 400 metres of corridors offer some of the most beautiful cave formations in the country.

Stalactites, stalagmites, and other cave formations were formed from calcium carbonate left by dripping mineral water.