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

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

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

America's first public mental health facility.

This old-fashioned carhop restaurant gave the world the waffle cone.

This historic mansion was built as a symbol of love between a husband and wife.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

An alternate history park where the Union Army loses the war... to dinosaurs.

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

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

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

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

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

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

Outsider art meets paleontology at this roadside reptile repository.

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

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

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

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.