Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

Slyly buy a shake in the Parker Meridien lobby.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

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

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.

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

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

The grotto where Saint Ignatius of Loyola lived as a hermit for nearly a year.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

This Roman arena once played host to bloody gladiatorial battles.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

If you like Art Deco you will love this bridge.

Living towers made of people that are now recognized by UNESCO.

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.

Long tunnels run under the ancient chariot racing circuit to the tower.

Super Robot anime statue guards a forgotten suburban development in Tarragona.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

The unexpectedly beloved remnants of a controversial thermal power plant.

This imposing modern citadel started out as a home renovation project.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.