19. The White House (Washington, D.C.)
Built between 1792 and 1800, The White House has been home to every U.S. president since John Adams. Its striking neoclassical architecture and storied halls capture the imagination, standing alongside the grandeur of Mount Vernon and Monticello. As both a working seat of government and a historic symbol, the White House continues to fascinate millions eager to glimpse the center of American leadership.
