This advertisement for talcum powder was painted on the rock face and has since defied removal.

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

An abandoned church gets a second life as a massive beer hall and event space.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Enormous lake at the bottom of a unique cave system.

This historic national park is covered in the stunning ruins of red rock pueblos.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.

One man's quest to save his town with a trail of record-breaking sculptures.

A natural dome made of volcanic glass in Inyo National Forest.

Four hundred granite steps were built into this massive rock by the National Park Service.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Quite simply the largest tree in the world (by volume).

Explore the legends surrounding these mythical sea creatures inside this museum.

The ruins of an old mill lie in a small ravine along a hiking trail near Little Seneca Creek.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A piece of outsider public art accompanied by a strange urban legend.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.