What is it about mushrooms that makes people wish they lived inside of them?

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

Illegal drag racing two stories beneath Chicago’s streets.

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

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

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

A relic of the Cold War in Chicago.

This folk art wall claims to be the world's one and only memorial to the bygone age of hippies.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

Moving, mind-blowing metal sculpture work of an outsider artist.

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

A giant Troll lurks under one of Seattle's oldest bridges.

This legendary urban waterfall creates a dazzling display of rainbows.

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 once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Buy a token from the liquor store and you can make this beast spew flames on command.

The world-record holder for the longest bridge stretching continuously over water.

The world's largest rotating world.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

Historians and hobbyists head to this former French outpost for the annual Feast of the Hunters' Moon.

A sprawling outdoor museum filled with larger-than-life works of art.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.