The world's largest reflecting pool is just two centimeters deep.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

The highest peak in all of England is plagued by dangerously fickle climate shifts.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The deepest hole drilled in the name of science, where evidence of Precambrian life was found.

This ghost town in Belgium will lose its street art when it ceases to exist.

A spectacular cave and a beguiling lake.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

This Canary island is a quintessential example of nature’s beauty, and its unbridled fury.

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

A salty cave excavated by elephants and the location of a deadly disease vector.

Strange sandstone canyon known as the "place broken by itself."

Human ancestor’s 3.6 million year-old footprints.

The largest game reserve in Africa is home to thousands of species but refuses to house humans.

Landscape of bizarrely shaped desert mountains and innumerable rock carvings.

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

The world's oldest individual clonal tree looks like a wimp despite standing tall for 9,550 years.

Walk 2,300 feet above the ground on the "Troll's Tongue."

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.