Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The only recreation of William Shakespeare's indoor playhouse.

At 207 feet, one of the world's longest continuous escalators.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

One street divides a single town that stands in two U.S. states.

The resting place of a Civil War celebrity's amputated limb.

A small Richmond island dotted with the remnants of hundreds of years of history.

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

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

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

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.