A natural gas leak provides a flickering flame beneath a waterfall.

A strange tribute to all the fallen souls of war.

A spectacular cave and a beguiling lake.

The largest known meteorite on Earth was too big to move.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

Tropical paradise strewn with hundreds of World War II wrecks.

An isolated dive site teeming with cnidarians.

A seemingly endless landscape of pure salt stretches far across Bolivia.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

A geological bull's-eye visible from outer space.

Odd outsider art installations surround a Gold Rush-era ghost town.

The rocks in this arid basin leave trails of movement behind them.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The loneliest island in New York.

The world's most remote memorial to the victims of the UTA Flight 772 disaster.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Site full of incredible prehistoric paintings and archeological findings.

A submerged village appears when dam levels drop.

A defunct all-girls college which may be the resting place of H.P. Lovecraft's real-life Necronomicon.