The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Enjoy dishes that founding fathers once ate at this Colonial Williamsburg pub.

At a Bangkok bistro, one pot of beef stew has been cooking non-stop for more than 45 years.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

This edible park is open to any and all foragers.

A moody and picturesque riverside ruin overgrown with vegetation.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Nature took her revenge on the "Wickedest City in the World."

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

A snapshot of the city's fascinating voodoo culture.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Six beautiful wooden giants are hidden around Copenhagen.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

This tiny museum's sizable collection is jammed into a former underground public toilet.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

A retired military stronghold on the rolling green coast of Donegal.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

The remains of this deep, dark mine have left behind a haunting rocky warren of tunnels.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

Where manatees are the snowbird vacationers in these balmy Florida springs.

More than 5,000 contemporary and "historic" mustards from around the world.

A mysteriously dark cemetery monument fuels stories and legends galore.