Hundreds of antiquated typewriters and office machinery show the technological evolution of business.

The historic home still shows the scars from a little run-in with the British in 1813.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

This collection of odd proofs of concept is like taking a walk through the imagination of a Victorian engineer.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

FDR's Art Deco hospital tower was hopelessly inefficient.

This former asylum for Black Americans is haunted by its history of violence and racism.

The U.S. government built the million-pound stack of steel during the Space Race.

The Decoy Capital of the World.

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

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

The world's oldest continuously operating airport was founded by the Wright Brothers.

One of the only memorials dedicated to journalists who died in combat.

This one-room cabin where the young colonel slept during the French and Indian War.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

Tiny observatory made big contributions to the study of the Earth's motion.