A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This abandoned Slovenian military barracks has become a punky-political art squat.

The most powerful laboratory radiation source in the world pulses with 1,000 times the electricity of a lightning bolt.

At this research institute, the chile is king.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

If it wasn’t for an innovative use of quilts during a crisis, the city of Panguitch might not exist today.

A replica that won't float away.

A homage to the King at the hotel where he revived his career.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

No one is sure why this mysterious tradition started.

Three hundred years of preserved Spanish colonial history in San Antonio.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

A grove of colossal man-made flowers built to collect the sun's rays.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Moscow's imposing monument to the Space Age.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.