Costa Rican accommodation resembles a crash site, but with a nice balcony.

Frequent fliers welcome in this airplane hotel.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

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

This grounded passenger jet is now a restaurant, complete with rows of seats and “flight attendant” servers.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

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

The longest hedge maze in the world.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Rippling sand dunes frozen in the Arizona rock.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

This shop for all your super spy needs hides an educational secret.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

Right up until the 20th century this network of man-made caves was the biggest village in Eastern Armenia.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This eccentric cave dwelling is bizarre even by the standards of a subterranean town.

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

An 18th-century hideout became a permanent and ongoing residence for one Lesotho tribe.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

In this historic region, homes and churches are carved into ancient volcanic rock formations.