Fragments of a massive unfinished sculpture sit near the main quad of the University of Illinois.

A source of civic pride, though the reason for its construction is unknown.

A mini Wrigley Field for mini baseball players.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

This former nursery supplied plants for the creation of Chicago's largest park.

Chicago’s incendiary role in the labor movement.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

Huge abstract sculptures of the Puerto Rican Flag.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

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

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

To find the "unicorns of the deep" you've got to go downstairs.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

The mysterious white squirrels of this Illinois city are treated like sacred cows.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

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

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

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