Scotland still bears an enormous scar of its Roman past.

A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

A pub that is literally in the middle of nowhere, but continues to do business.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

These eerie outliers of the lightning bug family glow a mysterious blue color.

This permanent exhibition of commercial signs aims to preserve the cultural heritage of the city.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

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

Check out the underground party scene at the "Burning Man of Brooklyn."

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

The most radioactive spot in New York City can also fix your muffler.

Radical Bookstore and Community Space.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

This structure among the trees was the result of divine inspiration.

Joe Minter is only doing the work of God in his yard, he says.

This historic general store still operates much as it did in the late 1800s.