Planet Earth: Caves

Call in sick, take the day off, quit your job if you have to... Today, Sir David Attenborough takes us through a fascinating journey, exploring the last great frontier on Earth: Caves.

Filled with unbelievable footage, and to the sound of a beautiful musical score, this episode will acquaint you with a world full of exotic life forms and amazing geological formations, including the world's greatest concentration of crystals. Some of these caves are so large that not only could jumbo planes fly through them, they could easily engulf the Empire State Building!

Watch out for the amazing optical illusions that form when fresh water meets with salt water; it's truly mesmerizing...

Hungry for more? Check out the rest of the Planet Earth episodes.
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