America's only nuclear missile silo open to the public.

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

This ancient trail has claimed the lives of over 2,000 people.

Semi-recognized center of the world, with many oddities.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

This extraordinary project brings water from the Colorado River to Southern California.

Ancient human, animal, and geometric figures drawn in the earth.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

Once a year, at exactly 11:11 a.m., this monument comes to life.

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

An oddly specific collection of handmade dolls remembers the women of the White House.

This rural museum highlights Wyoming's era of trapping and fur trades, and hosts the annual Green River Rendezvous in July.

This 35-foot troll in Jackson Hole, Wyoming, was made by the world’s leading recycling artist as part of a global fairytale.

This rustic old building is said to be the most photographed barn in America.

A 6-mile-long lake created by an apocalyptic seismic event and the deadly chain reaction that ensued.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

The source of America's longest river is also a historical landmark and the start of a famous nude run.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

Cross the Continental Divide through an old railroad tunnel, and ride back to the top on a shuttle.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.

A walk through the historic city center, under the streets of Seattle.