The Washington Monument is the world's tallest stone structure and obelisk.
The U.S. Capitol Gatehouses and Gateposts are an architectural ensemble located in the nation's capital.
The Sidney R. Yates Federal Building houses the headquarters of the United States Forest Service.
The Lockkeeper's House is the oldest building on the National Mall.
The Jamie L. Whitten Building serves as a remarkable example of Beaux-Arts architecture.
The United States Department of Agriculture South Building is a prominent government complex.
Memorial Continental Hall serves as the headquarters for the Daughters of the American Revolution.