Largest sub-glacial lake ever discovered.

An unmarked, overgrown path through dense vegetation leads to the largest ancient structure in Polynesia.

At the point of oceanic inaccessibility, you can't get farther from dry land without leaving the planet.

A hotly contested micro-nation off the coast of Montserrat.

This cave located in the badlands of Somaliland contains some of the oldest cave art in Africa.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

These 40,000-year-old stenciled hands are older than the famous cave art in France and Spain.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Land that belongs to no nation.

A micronation on an islet along the coast of a Portuguese island.

This striking icon of the disputed Republic of Artsakh caused a stir at a Eurovision Song Contest.

Though the original building has been demolished, these massive bronze doors were saved.

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.

A promotional sun clock on the site of San Francisco's great raceway.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

The birthplace of the very first human resident born in Antarctica.

Final resting place of Antarctic explorer Ernest Shackleton.

It might not be as impossible to reach as its name would imply, but just about.

A tall karst islet popularized by 007.

Contrary to what its name suggests, you won't find any bunnies here.

The world's most remote permanent settlement on an active volcano.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.