A former major munitions plant that has been converted into a sprawling art space.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

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

The most accurate timepiece in the world.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The "lovely red Vega" of the legendary record-settling pilot.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Decades before the scandal, this staircase on the river was a literal "water gate."

At 207 feet, one of the world's longest continuous escalators.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

An exotic wildlife habitat right off The Strip.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

What is the Thing?

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

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

A spiritual vortex among the red rocks in Sedona.

An urban laboratory.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A geological mystery on Camelback Mountain.