Over 120,000 curious objects that have shaped our modern world.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

The most photographed house in Maine looks good enough to eat.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

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

A motel dedicated to Southwestern nostalgia.

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

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A Wild West jailhouse that slid down the mountainside.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

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

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

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.