The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The abandoned coal loading dock is a canvas for unsanctioned art.

World's first "penitentiary," meant to be humane, drove men insane.

A unique marker erected during the 18th century.

The maritime museum that boasts the largest nautical library in the western hemisphere.

The location where the American Revolution ended.

Dedicated to the man who created the first radio wave communication system.

A family agreed to sell their property to Disney on the condition that this tree, planted as a wedding gift, would not be removed.

The famous animator's private station house and man-cave was the birthplace of imagineering.

Deep into the lower floors of Pike Place, find a date with fowl fate.

Now a public art piece, this curious metal feature originally advertised a tinsmith's services.

This giant roadside fruit is home to an array of apple-based treats.

The longest enclosed pedestrian bridge in the world spans 14 lanes of traffic and six rail tracks, all while lighting up the night sky.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.

A touching tribute to the "Wonky Donkey."

The remains of the oldest bone-headed dinosaur in North America.

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

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

Toxic waste disaster that founded the Superfund program.

A brass and marble scale model of the solar system embedded in the concrete.

Believed to be the birthplace of the United States Marine Corps.

A miniature train theme park, free to the public, laying at the base of the Santa Monica Mountains.