Meltdown, The Alps Under Pressure, National Geographic Magazine: Ice Diving Extreme Sports

Two men in wet suits sit on ithe ice to dive in a frozen lake.

Winter athletes looking for a challenge are drawn to extreme sports like ice diving in Lake St. Moritz in Switzerland. A hole is cut in the frozen lake for the scuba divers, but at night a foot of ice forms over it, so the following morning, the hole must be reopened.

After the initial shock, some divers find the experience claustrophobic. Diving in subzero temperature requires advanced diving skills and a desire for adventure.

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