A beautiful geyser under environmental threat.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The National Park Service’s best-kept secret with views that rival any in D.C.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

Home to items never before seen by the public.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

It's safe—and permitted—to walk across these twin natural sandstone arches.

A crack flared at the base provides a pathway completely through a sandstone ridge near Moab.

The fifth-longest natural arch in the world, and the longest outside China.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

Two small markers remember the Alamo's feline protectors.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

One of the best-selling bar bands in American music history is commemorated in their hometown's Five Points neighborhood.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

Hundreds of protractors affixed to surfaces all over the city.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

This steam locomotive served as both an interesting static display and unique playground equipment since 1959.

Beneath its placid surface, one of New York City's primary sources of drinking water hides a haunted past.

A peaceful international sculpture garden in upstate New York.