Deep vertical fissures like miniature slot canyons cut across the cemented volcanic rock of Black Point above Mono Lake.

One of the largest collections of intact Victorian-era waterworks equipment in the world.

A unique collection of drawings that represent Fremont Native American culture.

How did a massive marine arthropod find its way to landlocked Ohio?

The oldest pictographs on this decorated rock formation in California's Carrizo Plain date back as many as 4,000 years.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

Ruins of the original wooden flume that carried water to Virginia City are still visible high on the Virginia Range.

A whimsical, punny collection of "fence art" outside the tiny mountain town of Baker, Nevada.

A new kind of theme park for adults off the Las Vegas Strip.

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

A surviving concrete arrow from a 1920s navigational network is preserved right off a modern freeway.

Once damaged by Hurricane Agnes, this bridge is now on the National Register of Historic Places.

Now a pedestrian bridge, this was once part of a narrow-gauge railroad that ran along the east coast of Kauai.

The former home of the army detachment that captured Geronimo.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

The oldest Naval chapel in the United States is home to an incredible collection of Tiffany stained-glass windows.

A beautiful red-faced slot canyon in northern New Mexico.

An interesting look into 18th-century American history.

An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

This striking otherworldly landscape outside Angola's capital city is the product of millions of years of erosion.

A former elementary school houses one man's extensive collection of art, artifacts, and taxidermy.

The mounds at this site were reconstructed with the help of archaeologists and historians.

An attractive alpine lake at 8,400 feet that is accessible via a paved road.

The longest spit in the United States ends at a lighthouse in the Strait of Juan de Fuca.