Inside houses a vast collection of military aircraft and missiles spanning the ages.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

A wonderfully curated used bookstore in an airport.

A place to eat for on-the-run agents and espionage enthusiasts.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

A factory in Milwaukee where poop is reclaimed… and recycled.

A unique botanical garden housed in three giant geodesic domes.

One of Frank Lloyd Wright's final works was this UFO church.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

See where Bill Murray kidnapped a hapless Punxsutawney Phil.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

The famous Beatle secretly visited this Illinois town several times to visit his sister.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

All of Chicago's wood-paved streets are long gone but two alleys remain.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Years of archaeology, just chillin' by the water cooler.

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

These pretty kitties killed and ate as many as 135 railway workers.

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

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

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.