One of the largest Native American shell middens stands 30 feet tall.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

A miniature golf course crafted inside the world's largest simulated cave.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

Mysterious rocks that ring musically when struck.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

This gallery of prehistoric red ochre art lines the wall of a scenic segment in Utah's San Rafael Swell.

This quiet park's strange sedimentary spires were named after Kodak's color film.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

This lonely gas station has stood at this location since 1917.