Illegal drag racing two stories beneath Chicago’s streets.

Nature's biggest mammal swims in landlocked Oklahoma.

"We Seceded Where Others Failed."

The first KFC is on the National Register of Historic Places.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The highest bridge in America was built for an almost unnervingly small amount of money.

There are eight natural springs around town, each with a slightly different taste.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The island residents are known for taking their quirky sense of humor with them to the grave.

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

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

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The world's longest known cave system.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

One of the largest underground systems runs under Canada's largest urban center.