The cliff and rock formations are made out of Sioux Quartzite.

The Grand Canyon’s original airport, which once welcomed pilots like Amelia Earhart and Charles Lindbergh, lies abandoned.

Winter and summer solstice aligned sculpture in the middle of nowhere.

A well-preserved set of ruins not far from Lovelock.

A neighborhood grocery store established a local civil rights leader.

This historic Ellinwood hotel is also home to underground tunnels that were a popular haunt during Prohibition.

A haunting—but not haunted—chapel remains in the woods.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

Below this enormous headstone lie Billy and Benny McCrary, better known as the "McGuire Twins."

A series of silhouettes that recall the great cattle drives of the 19th-century.

Inspired by a piece of concrete, these three pyramid-shaped buildings have been beloved Indianapolis landmarks for over 50 years.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

One of the last remaining covered bridges in the region.

A lighthouse on this West Virginia lake started as a joke, then the forces of nature helped make it a reality.

The ruins of a resort and casino sit on the banks of this blue hole spring that pumps 70,000 gallons of warm, clear water every minute.

A 60-foot-tall tower provides unparalleled views of the southern Green Mountains.

Irontown was founded in 1868, as a second attempt to mine iron from the nearby Iron Mountain.

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.

A set of tall pillars and alcove-like rooms that are significant to the Miami people of Indiana.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

Harder layers in colorful sandstone weather out as prominent “fins" and even more intricate and bizarre shapes.