Burial mounds of prehistoric Native Americans who lived along the DuPage River.

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

These mansions date back to Chicago's days as a brewer's paradise.

This shop for all your super spy needs hides an educational secret.

Landmark Chicago building narrowly avoided destruction.

The palatial McDonald's that inspired Wesley Willis.

Illegal drag racing two stories beneath Chicago’s streets.

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

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

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

This supper-club-turned-concert-venue still serves drinks at its original rotating bar.

The site of an ancient Mississippian settlement that appears to have flourished during the 10th to 13th centuries.

This baseball diamond was home to the Rockford Peaches, a team featured in the hit film "A League of Their Own."

This unassuming city park is home to three different types of Native American mounds.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

The oldest continuously occupied public building in the United States.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

It's easy to see why this eclectic architectural wonder has been dubbed the "Spaceship House."

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

The only Native American comic shop in the world.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

The fading, forgotten remains of a once bright and booming factory.

The blinking light atop the iconic landmark has been sending secret messages for decades.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.