The only U.S. Senator to die on the field of battle is buried in San Francisco but memorialized at Balls Bluff Regional Park.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

This twice-relocated "Usonian" home is among the smallest built by master architect Frank Lloyd Wright.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

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

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

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

The location where the famed author and abolitionist began his journey to freedom.

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

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

The "Key of Keys" for Washington, D.C. and the apocryphal landing place for the military campaign that started George Washington's career is now at the bottom of a well.

The world's oldest bookshop still in operation.

Building owners can take out tiles for free at this repository for historic building materials.

This Annapolis home was built by one of the signers of the Declaration of Independence.

This painted blacktop brings the classic arcade game to life.

This former coal gasification plant found a curious second life as a popular public park.

A lighthouse on this West Virginia lake started as a joke, then the forces of nature helped make it a reality.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

This Jewish bakery, among the last in the region, sells legendary sweets from a century-old storefront.

The Cape Cod house that whaling built.