A gateway to a mysterious network of underground tunnels.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

This plaza at the end of the world teems with monumental tributes to a problematic history, and laser discs.

The most southern point you can drive to in the Western Hemisphere.

A fantastical and futuristic temple of light built from nine monumental glass veils.

A beautiful deserted greenhouse in the middle of a park.

How a lunch counter in Chile became a shrine to the 42nd president of the United States

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This lucky bronze frog was gifted to Madrid by a casino.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

This small museum tucked within a subway station holds pieces from Madrid's past.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

An old, deep well, connected with a miraculous, divine rescue and the patron saint of Madrid.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

An aviation relic that made coast-to-coast travel possible.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This bridge is haunted by the ghost of a distraught mother.