Retro Unit
Amazing Underground Secrets (DVD, 2011) Documentary All Regions
Amazing Underground Secrets (DVD, 2011) Documentary All Regions
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AMAZING
UNDERGROUND SECRETS
Mastering the Underground World
Beneath the Earth's thin skin of rocks and soil, there's an inner world, full of surprises. Discover places you weren't supposed to see and secrets that were never meant to be revealed. Marvel at hidden treasures, natural wonders, and the extraordinary ways we are mastering our planet's underground worlds.
Our planet's underground world is our new frontier... it's full of potential, but harnessing it is difficult, and very dangerous. See the secret that kept the ancient city of Petra at the centre of trade routes for hundreds of years. How did the Italian city of Orvieto survive sieges? Marvel at Istanbul's ingenious cisterns, some as big as cathedrals. Be there as a great tunnel is constructed underneath the Swiss Alps, testing human ingenuity to the maximum.
Elegant ancient underground waterways, mining for spectacular natural treasures, uncovering the secrets of the Universe... discover all this and more in the Mastering the Underground World volume of Amazing Underground Secrets.
C8.3.25111.16e
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