Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This miniature take on the Kremlin is one Dutch man's retirement project.

Mosaics created from 11 million cigar bands.

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

Continuing the tradition of the dime museum in style.

The house's confection-like decorations are the result of one man's painstaking work over decades.

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

Designed to honor the birthplace of Buddha.

The largest and, arguably, most scenic fortress in Bhutan.

The earliest pagoda built in the beautiful Panmen Scenic Area of Suzhou.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

This colossal structure and its accompanying angel often play tricks on the eyes.

Deep below the dry landscape of Bahia, a cave with intense blue water to float in.

High plateaus and beautiful waterfalls frame this ecologically significant nature preserve.

The (usually) serene burial place of the world's most notorious drug lord.

A stone circle on the slopes of a Caribbean volcano commemorates the leader of an anti-slavery uprising.

Send a postcard while vacationing with Satan.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

Half-hidden by grassy slopes, this striking Spanish colonial fort is now a museum of underwater archaeology.

Three small rooms in the jungle house the most elaborate and intact murals of the Mayan world.

The enigmatic and seldom visited ruins of a Mayan city-state.