A brick-paved former section of the historic coast-to-coast highway.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

Moonbows over Kentucky.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

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

The final resting place of two unknown soldiers.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

Built by an accountant with a dream of running a grand resort, this estate has sat vacant for over half a century.

Walk up a ramp through a forest for panoramic views of Lake Michigan.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

This cave holds a surprisingly colorful variety of geological oddities.

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

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

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

A historic dam made famous for its turbines and feature in a Hollywood classic.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

This building contains handprints that are well over a century old.

More than five miles of underground passageways.

This historic train station has been converted to a locomotive themed hotel.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.