Season 2, Episode 4

Oman's Wadi Shab

From a gorgeous underground lagoon on the Hawaiian island of Oahu, to an adrenaline-filled 70-foot cliff jump in California, to the most unexpected scuba dive location in the world, these audacious explorers uncover the planet's best-kept swimming hole secrets.
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Scotland's Fingal's Cave
Singapore's SkyPark

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