This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

A hollow cement depiction of time's inexorable effect on the human body.

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

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

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

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

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

The face of a woman pushes its way through the earth.

More than 8,000 drinking jugs say “Cheers!” to a guy named Toby.

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

An antiquated German apothecary on Chicago's North Side.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

This unique zoo is the only place in the world where you can see all 15 species of crane.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.