Australia's Surfers Paradise is a thrillseekers playground -- perfect for climbing the highest point on the beach, only to drop into Australia's most hidden swimming hole. Then, we jet over to Hoi An, Vietnam, for the ultimate beachside markets.

Cannonballs and belly flops are far more fun in these backyard swimming pools. Leaping from the tops of caves and waterfalls to back-flipping off rocks and arches make these pools have the ultimate splashability factor. Enjoy an up-close look at backyards with swimming pools that offer the biggest splishes and splashes in town.

A tattoo artist buys a house with a mysterious hole in the floorboards. She is soon haunted by the ghost of another woman and must unearth a long-buried secret to solve the mystery.

Wendy and Jeremy Gilbert venture beyond Oahu's popular attractions to highlight the island's hidden treasures, from swimming with sharks to kayaking to a secret beach.

From the sun-baked Caribbean to the snow-crusted peaks of the Swiss Alps, we dive into the world's most magnificent and unexpected watering holes. We discover the secrets that lie beneath the extraordinary waters and soak in the breathtaking views.

Paul tries to identify what he saw during an aerial recon over a top-secret military base in the Mojave Desert.

Jamie Theakston reveals the extraordinary story of a top-secret Bulgarian kill squad that operated in nine countries during the Cold War.

An ultra top-secret military base and the deathbed confessions of some of the brightest minds of the 20th century could provide real evidence of the existence of UFOs.

Don Wildman heads deep into the Nevada desert to see if he can uncover the truth about what's been going on at America's most top-secret base.