A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Symbolic attempt to overcome the issues of life.

Part of a worldwide art project, this mysterious semicircle of concrete shapes holds the pieces of a larger story.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

The dream home of an iconoclastic renaissance man still stands as a monument to his domestically mundane vision.

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

A bizarre house filled with an astounding array of collections.

Five acres of divinely inspired folk art.

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

Large one-man sculpture park in Michigan.

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

An unlikely beach paradise of giant sand dunes lies between two lakes just a few minutes from Michigan's cherry country.

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

The park is home to the United States's only still-operating Dutch windmill.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

One of two giant blue cockerel statues erected with an intentional double meaning.

This Minnesota town celebrated the state's 100-year anniversary by creating a massive ode to nature's smartest bird.

The statue honors the booming birds Rothsay, Minnesota, is famous for.

A fitting attraction for the corn capital of the world.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.