The document describes various cave formations found around the world. It discusses limestone caves in southern France that were formed by water dissolving limestone rock. It also describes an ice cave in Austria containing formations like icy needles and stalagmites formed from dripping water freezing. Finally, it mentions the deepest cave in the world located in Georgia that descends over 2,000 meters underground.

1. The Crystal of the Devil
Ready to go down into the belly of the Earth?
Ready to go down into the belly of the Earth?
It is not always easy. A descent of 40 meters leads to a large cavern. It is in the Causse Noir
(southern France), limestone plateau where the waters have carved caves: limestone rocks are more
It is not always easy. A descent of 40 meters leads to a large
easily dissolved by water, acidified by the CO2.
cavern. It is in the Causse Noir, Southern France, limestone
plateau where the waters have carved caves: limestone rocks are
more easily dissolved by water, acidified by the CO2.

2. Well green
In the vastness of this deep well over 100 meters is easy to miss
the proportions. You see the caver who is climbing abseiling?

3. Medusa underground
In a cave in the mountains of the French Montagne Noire, a
Spectacular "jellyfish" red calcite - stalactites of this mineral are
formed by the precipitation of calcium carbonate present in water
droplets that descend into the caves.

4. Cathedral glacial
A tunnel in a glacier in the Alps of Berchtesgaden, Germany. So
are caves carved by water flowing inside or under them, and
that comes from melting on the surface, or formed under the ice
if there are hot springs or volcanoes.

5. Ice teeth
A mouth seems to eat an ice cave caving in Eiskogelhöhle,
Austria.

6. Icy needles
These stalagmites of ice seem to sprout from the ground. But in
reality formed by water dripping from the ceiling, the air cold
freezes water droplets that are deposited on the ground.

7. Ice climbing
In the eyes of two cavers time seems to stand still. The
stalactite of ice is located in Austria.

8. Art of clay
These striped Kalkstäbchen hang just a few feet above a
creek. The brown layers formed when the water level rises
and the cave is flooded. Then the mud deposited from the
turbid water

9. Max Wisshak in a sea of aragonite crystals in the Causse
Noire, Auvergne, France

10. Cave passages
This circular pressure tube is unique in its perfection, it was only by
water power. The corridor is located in the Ardèche region of France,
60 meters deep in the earth, far below the water table

11. Dangerous mold
Thrive in the underground creatures that are perfectly suited to the
environment inhospitable. As in the case of this mold that grows on
organic material dead. Please note, in case of inhalation may be
harmful to humans.

13. Sticky traps
Sticky traps
There are even tiny stalactites and limestone formations
hanging from the ceiling of a cave. In New Zealand, in the caves
of Waitomo and hanging from ceiling fluorescent larvae of
fungus gnat - Arachnocampa light. These larval flies emit a
greenish light very weak. Aided by the darkness of the caves and
their relative abundance larvae make walls glow of the
filaments. And sticky.

14. A Cave for Fakirs ...
A carpet of delicate gypsum crystals, up to 20 cm long: one
of the unusual formations of Lechuguilla Cave, USA,
-196 km long, is one of the longest.
The cave - Krubera Voronya, in Georgia, however, is the
deepest in the world down to 2,190 meters, including
wells and sunken passages.

15. Petrified Waterfalls
Frozen waterfalls in Eiskogelhöhle, Austria - at 2,100
meters, is an ice cave, where the cold air remains "trapped"
and the water that infiltrates gives rise to spectacular ice
formations.