Cave exploration, or pot-holing, as it has come to be known, is a relatively
new sport. Perhaps it is the desire for solitude or the chance of making an
unexpected discovery that lures people down to the depths of the earth. It is
impossible to give a satisfactory explanation for a pot-holer's motives. For
him, caves have the same peculiar fascination which high mountains have for
the climber. They arouse instincts which can only be dimly understood.#
Exploring really deep caves is not a task for the Sunday afternoon rambler.
Such undertakings require the precise planning and foresight of military
operations. It can take as long as eight days to rig up rope ladders and to
establish supply bases before a descent can be made into a very deep cave.
Precautions of this sort are necessary, for it is impossible to foretell the
exact nature of the difficulties which will confront the pot-holer. The
deepest known cave in the world is the Gouffre Berger near Grenoble. It
extends to a depth of 3,723 feet. This immense chasm has been formed by an
underground stream which has tunnelled a course through a flaw in the rocks.
The entrance to the cave is on a plateau in the Dauphine Alps. As it is only
six feet across, it is barely noticeable. The cave might never have been
discovered had not the entrance been spotted by the distinguished French
pot-holer, Berger. Since its discovery, it has become a sort of potholers'
Everest. Though a number of descents have been made, much of it still remains
to be explored.#
A team of pot-holers recently went down the Gouffre Berger. After entering the
narrow gap on the plateau, they climbed down the steep sides of the cave until
they came to narrow corridor. They had to edge their way along this, sometimes
wading across shallow streams, or swimming across deep pools. Suddenly they
came to a waterfall which dropped into an underground lake at the bottom of
the cave. They plunged into the lake, and after loading their gear on an
inflatable rubber dinghy, let the current carry them to the other side. To
protect themselves from the icy water, they had to wear special rubber suits.
At the far end of the lake, they came to huge piles of rubble which had been
washed up by the water. In this part of the cave, they could hear an insistent
booming sound which they found was caused by a small waterspout shooting down
into a pool from the roof of the cave. Squeezing through a cleft in the rocks,
the pot-holers arrived at an enormous cavern, the size of a huge concert hall.
After switching on powerful arc lights, they saw great stalagmites - some of
them over forty feet high - rising up like tree-trunks to meet the stalactites
suspended from the roof. Round about, piles of limestone glistened in all the
colours of the rainbow. In the eerie silence of the cavern, the only sound
that could be heard was made by water which dripped continuously from the high
dome above them.&