Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

The ghostly remains of what was once the world's richest copper mine.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

A scenic ravine with an astounding collection of rock art created by the Indigenous people of the Great Plains.

The crumbling remains of a gold mine that was operational in the 1930s.

Four abandoned towers hidden above the Douglas fir forest in Washington.

This Cold War missile launch site has been abandoned for 40 years.

What started as a display of antique hearses has grown into a museum exploring the history of the funeral industry.

One of the few surviving examples of the first lock and dam system built on the Ohio River.

Once home to a thriving oil industry, this town now sits eerily abandoned.

This former zinc operation has a 90-year toxic history.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

The isolated final resting place for perished coal miners.

Railroad came. People came. Railroad left. Town died.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

All that's left of the quintessential "cabin in the woods."

Founded in 1925, this folk school attracts students from across the country and preserves traditional Appalachian art.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

Over 200 people were buried here with only a small stone to mark their final resting place.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.