Video: Caving Under the Glacier – Castleguard Cave

June 14, 2015 / Canada, North America

Learn about the exploration of Canada’s Castleguard Cave, still the longest cave in the country, in this historic video recently uploaded to YouTube.

Filmed by Sid Pirou in 1973, the video was commissioned by Parks Canada, for the cave is located within Alberta’s Banff National Park.

[via YouTube]

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