In the palace with a thousand doors, not all of them are guaranteed to lead you somewhere new.

The site where the Spanish first landed in Mexico was once a thriving Mesoamerican city.

Hidden in the hills is a mysterious stone structure, known only to a few.

This museum showcases the art of ancient sword-making.

A unique rock formation that only a few have managed to venture inside.

This life-size monument honors the legacy of a famous literary feline.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

An inconspicuous footbridge beloved by San Diego locals.

18m long sarcophagus of a constantly growing dead prophet.

Home to a forest of whimsical pygmy Coast live oak.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

The largest known Ancient Egyptian obelisk.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

An alien landscape of chalk-rock in the Egyptian desert.

An ancient city exhumed from the depths of the ocean.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

For 60 years, skiers have calmed their nerves with cocktails hidden along these slopes.

Six miles off the coast of Key West, a former military transport ship is now one of the largest artificial reefs in the world.