A walkable map of the world, made from soil and stone by one man.

This historic cemetery was inaccessible for several years due to dozens of land mines.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

These medieval ruins have survived since the 12th century, even providing shelter from the Nazis.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This winding road through an Italian canyon may be the most scenic drive in the world.

A mysterious collection of stones stand outside a small New England town.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

This was one of the first (and last) university-built and operated nuclear reactors.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This miniature take on the Kremlin is one Dutch man's retirement project.

A little known pile of scraps and plaques mark the grave of a downed RAF bomber.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

This trio of stone spires claims to be the only preserved medieval execution site in Europe.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

No matter what it might seem like on film, most scenes filmed on a plane are filmed at this LA studio.

This beautifully historic Bahrain fortress might not be the most popular attraction around, but that might make it all the better.

A mega theme park-wax museum mélange containing all things biblical.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.