If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

One of the largest open-pit copper mining operations in the entire country.

The world's largest military aircraft cemetery.

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

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

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

A mysterious "wedding cake" castle in the middle of the urban desert.

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

An emporium for the weird, creepy, rare, and just plain gross.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

Man-made geyser that rises to the exact height of the Gateway Arch.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

A wild west land agreement was etched right onto this historic Idaho stone.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.