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.

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

Historic home of America's sweetheart sharpshooter, Annie Oakley.

This statue of two men in a rowboat was erected to honor those who died while fishing in the Chesapeake Bay.

The only one-room schoolhouse remaining in Talbot County, Maryland.

These small house replicas have stood proudly since the 1950s, even as the property has changed hands.

The local community brought back this land to transform it into a nature preserve.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

One of the earliest and best-preserved buildings in Charles County, Maryland.

At Brandy Station, Civil War soldiers left their mark on the battlefield and the walls of this small wooden house.

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

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

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

Constructed in 1882, this jail once housed local inmates and the sheriff's family all under one roof.

An office built to look like a giant basket.

The mounds at this site were reconstructed with the help of archaeologists and historians.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

A cult archaeology conspiracy theory claims these West Virginia petroglyphs were written by Irish monks in Ogham.

A historic coal mine that doubles as a museum and tourist attraction.

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

The oldest arched-covered bridge in Virginia has truly withstood the test of time.