Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

A wall of chewing gum moonlights as collective art.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

The former home of the man whose radical ideas changed the nation.

More than a century old, this trading post resides in the Navajo Nation.

Don't blink or you'll miss it.

The remains of a boarding school designed to forcibly assimilate Native American children.

The filming location of a shark attack in Steven Spielberg’s famous shark movie.

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

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

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

This functioning mill was built in the 1970s using parts from several other West Virginia mills.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

An abandoned coal mine reached by a steep hike.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Smack in the midst of coal country, this collection provides a peoples' history of Appalachian miners' heritage.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

An eerie, decaying ghost town destined to fade into the forest.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.