The maritime museum that boasts the largest nautical library in the western hemisphere.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

This tower was once used to create ammunition for early settlers.

This university transit system is a 1970's vision of the future.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

This one-room schoolhouse played a significant role in the education of Black children for almost 100 years.

Both the building and blades of this reconstructed 19th-century windmill can turn in a breeze.

The United States' oldest Episcopal church still in active use.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

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

The only recreation of William Shakespeare's indoor playhouse.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

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

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

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

One woman's Viking Castle on Lake Tahoe.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.

Concrete strongholds stand guard over the Golden Gate.

Erosion and time have created a naturally-formed water park.

The world's longest known cave system.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

This abandoned mine and power plant was built atop land once given to Revolutionary War soldiers.