This historic hotel invented the chocolate brownie.

Man-made geyser that rises to the exact height of the Gateway Arch.

Less a museum than a bizarre fantasy world created by artists and engineers.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

Where a brain, a beauty, a jock, a rebel, and a recluse met one Saturday and changed their lives forever.

A science teacher's dream.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A display of magnificent stained glass windows is the first exhibit of its kind.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A lush green oasis in the middle of Chicago.

A wonderland of caves in eastern Iowa.

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

Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.

This rare female version of the Muffler Man has its clothes removed each summer to signal the start of pool season.

Tiny treasures, giant murals, and strange sculptures decorate the windows and doors of this abandoned building.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

This architectural stunner is one of the few surviving Egyptian Revival theaters in the U.S.

World's second largest particle accelerator, where nature reveals its secrets.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.