One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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

When ecosystems collide in the arid Southwest.

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

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

The first declared National Monument in the United States.

A fitting attraction for the corn capital of the world.

The first American department store, and home to the largest operating musical instrument in the world.

The world’s first penitentiary, meant to be humane, drove men insane.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Oldest existing wire suspension bridge in the United States.

100 massive sculptures in the Hudson River Valley.

Home of Philip Johnson, one of the 20th century's most influential architects.

A once grand hotel is being retaken by the wilderness it once capitalized on.

The oldest continuously inhabited street in America.

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

This rocky spread has been squeezed up directly from the bowels of the earth.

An ancient Viking village in North America that predates Columbus by 500 years.

A fortified city, home to a remaining population of five families

One of the most spectacular canyons in the world.

Traditional 11th-century outdoor tannery.

Mosaics, storks, and brothels—this ancient city has it all.