Plot Synopsis

TOP SECRET SWIMMING HOLES is on a mission to uncover the world's most secluded, sexy and extreme natural places to cool off. The series takes viewers on hikes, climbs, boats and even dog-sleds to track down the most amazing places to take a dip, jump off a cliff or explore underwater caves -- from a crystal blue 100-foot waterfall buried deep in an Arizona Indian reservation and the ancient Mayan underwater caves of Mexico to America's oldest commercial quarry in Vermont and the only place on Earth where you can share your swim with a manatee. The series opener features slacklining across the red rocks of Arizona, a hidden world deep below a Minnesota lake, and much more. TOP SECRET SWIMMING HOLES returned for its second season at 10pm ET/PT on Sunday, January 1 and 8, 2017 on Travel Channel. Each one-hour episode features 10 gorgeous swimming holes per week -- from Mexico's mystical sinkhole caves, to the desert oases of Oman, to an invisible pool at the edge of the world's largest waterfall in Zambia, to Scottish pools believed to possess healing powers, and much more.
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After a six-month break, TOP SECRET SWIMMING HOLES returned for the rest of its second season on Sunday, July 23, 2017 from 9-11pm ET/PT, as Travel Channel premiered back-to-back new episodes:

"Scotland's Fingal's Cave" (9pm): Explore the world's most top-secret swimming holes, including the mystical Fingal's Cave in Scotland which boasts symmetrical basalt columns, and an incredible limestone pool hidden from the horizon in the desert of Oman.

"Oman's Wadi Shab" (10pm): 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.