A magnificent waterfall nestled in the heart of the El Yunque National Forest.

At 207 feet, one of the world's longest continuous escalators.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

After the oysters have been shucked, and the restaurant's been shuttered, the terrazzo sidewalk from the 1940s is all that remains.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

Comprised of Spanish war cannons, this sculpture once graced the bow of a WWI warship.

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

A bizarre house filled with an astounding array of collections.

This supper-club-turned-concert-venue still serves drinks at its original rotating bar.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Shop of curiosities with a dinosaur museum tucked in its basement.

The rodent-shaped sidewalk imprint that earned worldwide media attention.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.