Cathedral carved out of salt, located a mile below the earth's surface.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

Furniture tries to escape an abandoned building in San Francisco.

The only theatre in the world constructed specifically for sound movement.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

A dangling church built over a Colombian gorge.

A century-old bathhouse that provides the luxury of warm water to rural Guatemalans.

Volcanically heated hot springs.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

Giant kites are flown during this Day of the Dead celebration in Guatemala.

An enormous, 30-story-deep hole in the middle of Guatemala City.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

The stoutest tree in the world.

Southern Mexico under the influence of mushrooms, ceremony and celebrity.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

The subtle interplay of fire and water is hard to ignore at this remote Jamaican spring.

One of the most accessible undersea plane wrecks in the world.

Inhospitable caverns just beneath this island paradise offer insights into alien worlds.

Tubing through a cave lit with glowworms is a magical underground experience.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A garden in Lisbon filled with giant porcelain creatures.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The corpse bride of Portugal.