A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This bridge was constructed from the rubble of the infamous Bastille.

Where commuters walk through remnants of an ancient Greek necropolis.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The only castle in North America to ever house European sovereigns.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

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

This Costa Rican topiary park is a surreal garden of unearthly delights.

This Costa Rican chapel is the most metal church in the world, literally.