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Amazing Underground Secrets

Mastering the Underground World (3 of 3) (#103)

Some of the greatest human minds have been engaged in making the underground safe and accessible. Explore the most breathtaking feats of technology, past and present. [54 minutes] Closed Captioning

This episode has not aired in the past few months on Iowa Public Television.

PBS Video

Series Description: AMAZING UNDERGROUND SECRETS is an eye-catching, three-part series exploring the wonders that lie hidden below the planet's surface. It's a world of surprising, dramatic, awe-inspiring and sometimes magical things, from underground telescopes to crystal caves, from meandering tunnels to massive caverns to whole cities. Getting there is only part of the challenge; returning safely is a feat in itself.

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