A sixth-century Byzantine cistern hidden below a modern carpet store.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Roman ruins top white travertine terraces formed by ancient hot springs.

Morocco's Argania trees are infested with nut-hungry goats.

Safely view the Soufrière Hills volcano, which has been erupting since 1995.

This tiny home was originally a narrow alleyway.

Taoism, Buddhist and Confucianism are all represented in this temple that claims to answer anyone's wishes.

This hulking behemoth is actually five interconnected towers built in the 1960s.

George Martin's Caribbean recording studio now rots within the shadow of an active volcano.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

This large stone off the coast of Martinique had a brief career in the Royal Navy.

A Caribbean chef recreates his enslaved great-great-grandmother's dishes inside the home she purchased after buying her freedom.

This beautiful eden was once the vacation home of Tahitian royals before Marlon Brando bought it.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.

This restored colonial house was once home to the botanist responsible for bringing avocados to the U.S.

Tours drive right past this military burial ground to get the the Shirley Heights lookout.

A paradise hotel turned from opulent to overgrown.

One of just five sand-floor Jewish synagogues in the world.

This hidden courtyard in the Andorran capital hosts a unique contemporary sculpture park.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.