Camels and crocodiles share the black waters of this stunning Saharan oasis.

A 60-room castle constructed by a horse-racing heir.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Steep canyon walls hide a forested oasis in the West Texas desert.

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

The oldest still-operating tavern in the United States was once owned by a pirate.

This historic pub is a hidden gem for fans of Lewis Carroll.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

A historic observatory precariously perched at the "Top of Europe."

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Nestled in the heart of a Texas town is a dreamy secret garden dating back to the 1940s.

This Roman quarry once held secret masses and smuggler's contraband and is now home to rare species of bats.

Cliffs full of fossils at the portal to England's Jurassic Coast.

The highest point in Mississippi is a hilltop that was once used to bombard a nearby town with artillery.

A dramatically eroding canyon thousands of miles from the desert.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

Poet William Blake penned some of his most famous work during his brief stay at this beloved country cottage.

All that remains of this small town is its mass grave and a myth of a voodoo priestess who predicted its demise.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.