Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

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

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

An abandoned factory along the Mississippi coated by a giant mural.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

Combination beer garden and music venue in the heart of Wicker Park.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

A monument to the art of slicing people open.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

A hot dog stand where the heads are just as hot as the dogs.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

The 30,000-volume library is one of the world's most impressive poetry collections.

Rifle through images of skyscrapers, Worlds Fairs, and more in the largest public postcard repository in America.

A coin-operated washing machine turned jukebox, complete with an outdoor dance floor.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

This historic hotel invented the chocolate brownie.

A Japanese temple, old German townhouses, and public chess tables offer a peaceful escape from the bustle of the North Side.

A student designed this 3D-printed scale replica of the entire university campus.

The murals have transformed a residential alley into a vibrant drive-through gallery.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

Shop of curiosities with a dinosaur museum tucked in its basement.

In the middle of Calvary Cemetery stands this singular memorial to a small boy who died too young.