A diorama of the Civil War, fought by cats.

One of Gettysburg’s least visited battlefield memorials is off the beaten path, but worth a visit.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

Built by the patriotic residents of Boonsboro in a single day.

The ruins of an old mill lie in a small ravine along a hiking trail near Little Seneca Creek.

The hidden ruins of a mill that is linked to an attempt to assassinate the vice president of the United States.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

This field of concrete was once an active defense site armed with nuclear warheads.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

This labyrinthine resting place of Black American leaders has been reclaimed by nature.

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

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

Historic barracks utilized during both the Revolutionary War and the Civil War.

This hidden treasure provides a charming access point along the south side of Baker Park.

This four-story steel sphere in Maryland was used to test biological weapons.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

The smallest covered bridge in Maryland.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.