Fire meets ice at the southernmost volcano on Earth.

Southern Ocean waters and glacial forces transform the Antarctic ice into these stunning bridges and caves.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

Russian Orthodox church built on an Antarctic island.

One of only two civilian settlements in the desolate lands of chilly Antarctica.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

The bodies of some early polar pioneers are still buried beneath the harsh snows of the Antarctic.

One of the world's southernmost bars.

The largest piece of no man's land left on Earth.

Largest sub-glacial lake ever discovered.

This uninhabited volcanic island is the most remote in the world.

One of America's oldest Antarctic research bases is abandoned but still just waiting for visiting explorers.

This abandoned Antarctic research station is a Soviet ghost frozen in time.

The world's largest neutrino telescope searches for secrets of the universe at the South Pole.

Considered the most remote point in the entire world.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Most-visited and most-photographed slot canyon in the American Southwest.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

Limestone caves with spectacular showcase chambers.

An off-the-beaten path cave with an underground lake.

A mysterious spirit totem at the edge of Navajo lands.