D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

At 207 feet, one of the world's longest continuous escalators.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The romance of early commercial flight still fills this Art Deco destination.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The United States Capitol's former columns still stand.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

This grand gothic brewery has been pumping out suds for over a hundred years.