One of Chile's most active volcanoes is riddled with beautiful caves.

Cave on extinct volcano, once home to famous mathematician Pythagoras.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

An alien landscape on the banks of the Aegean Sea.

A miniature desert appears out of nowhere on the lush isle of Lemnos, like something out of a Greek myth.

A muddy alien landscape that is home to rare species of exotic plants.

Remote, volcanic island that Darwin, Hooker, and the Royal Navy shaped into a thriving, artificial ecosystem.

The world's most active stratovolcano is almost always erupting.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The oldest volcanology research center in the world.

Pompeii's less famous neighbor is still revealing her secrets.

A sulfuric hellscape in southern Italy.

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

After 11 years of reconstruction work, Slovakia's finest hilltop chapel complex is finally reopen to the public.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

This natural gas vent certainly earns its name as the smallest volcano in Italy.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

Religious dwelling in a Spanish volcano.

Village situated on a narrow volcanic escarpment.

A Gothic cathedral created from volcanic rocks.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.