The remains of a centuries-old water system that inspired local legends of secret tunnels.

Frida Kahlo's childhood home, now a museum of her life and works.

A sapling of the legendary tree where conquistador Hernán Cortés sat and wept after an Aztec uprising.

This singular broken monument, now housed in a museum, was the cause of a worldwide "Mayan Doomsday" phenomenon.

Colonial architecture meets urban art in this sprawling open-air gallery.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

An island graveyard with spectacular views of the Caribbean.

One man's fulfilled dream of living on an artificial island made of recycled plastic bottles.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

This colonial-era hospital chapel is now a foyer and side entrance to a popular department store.

Mexico's largest collection of masks is found in the ruins of an abandoned convent.

Hotel designed around a 16th century Mexican bullring.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

This Tibetan monastery has survived multiple attacks and is also a sky burial site.

Perhaps the only one of its kind, the nearly-forgotten site once held mortal (and rigged) gladiatorial games between tigers and imperial war elephants.

This historic spot was where America's involvement in the Vietnam War officially came to an end.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

One of the oldest temples in Ho Chi Minh City, dedicated to a deified Chinese military leader.

This French colonial post office is arguably the grandest in all of Southeast Asia.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Several ancient rock paintings can be found on the hills surrounding the Daramombe High School.