An enormous concrete structure built over a nuclear crater.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

A world-class theater sits hidden in this remote town in West Iceland.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

A modern Nordic Pompeii on the Icelandic island of Heimaey.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

Outlaws, hot springs, and tragedy have all left their mark on this ancient road in the Icelandic highlands.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

This stunning concert hall has become a symbol of Iceland's national recovery.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

A sulfuric martian landscape that looks far better than it smells.

A little-visited waterfall in an otherworldly landscape.

Three columns of volcanic rock shoot out of the ocean.