At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This statue honors the author's groundbreaking family story.

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

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

This statue of the "father of television" stands prominently in the United States Capitol.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The tunnel under the Capitol Building where Congress takes out its trash.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

A secret greenspace hides atop a Capitol parking garage.

This taxidermy horse was a Civil War hero.

Every drop of D.C. tap water flows through this old waterworks.

A line of blue paint marks the route of the inaugural parade.

This grisly headstone doesn’t seem to be resting in peace.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

Through the decades, Black music stars have performed at this historic hub for music and the arts.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.