Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A deserted 20-lane highway runs through Myanmar's empty capital city.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

This little known mountain has claimed four times as many lives as Everest.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

This encrypted monolith protected a secret of Norse mythology by hiding in a church wall for over a millennium.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

Despite its name, this route in southern Utah offers a heavenly day trip.

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

This stunning mass of ice spans 121 square miles and is still growing.

An Argentinian businessman facing terminal cancer built this whimsical medieval village using salvaged materials.

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Remote, beautiful, and stigmatized, Las Hurdes is Spain's version of Appalachia.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.