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3 Episodes 2017 - 0
Episode 1
Tue, Oct 24, 2017 60 mins
A secret blue cove on a military base in Guam is explored. An aqueduct is trekked through to reach a Balinese waterfall. Also: a natural water park in Puerto Rico.
Episode 2
Mon, Oct 30, 2017 60 mins
Adventure seekers check out the world's most top-secret places to take the plunge and enjoy a relaxing swim, including a hidden cave in Greece and a gorge in Japan.
Episode 3
Fri, Dec 21, 2018 60 mins
The world's most top-secret swimming holes are featured.