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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

The world's longest known cave system.

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

Elvis's own personal tropical hideaway.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

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

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

These aggressively sustainable art homes look like something out of 1970's science fiction.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A clear blue swimming hole with hidden caves, still unexplored.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.