Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

An ode to "The Queen of Appalachia."

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

An abandoned town is hidden in Great Smoky Mountains National Park.

A life-sized memorial to Harry L. Collins, the official corporate magician of Frito-Lay.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

One of the greatest boxers and humanitarians to ever live chose his hometown as his final resting place.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

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

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

This magnificent Cincinnati graveyard is also a popular public park.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

Rochester's signature culinary delicacy.

Comprehensive gaming collection of over 30,000 electronic games and consoles.

An unprepossessing stone marks the last resting place of one of the most accomplished Native Americans in history.

An elaborate memorial to a man local legend says died of a broken heart.

The seat of Buffalo government is a gorgeous Art Deco palace.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

The first outlet of Canada's biggest fast-food franchise has been slinging doughnuts since 1964.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.