Architectural Digest takes you to Washington, D.C. for a walking tour of The National Mall with architect Nicholas Potts, highlighting some complex architectural details hidden in plain sight. The development of our nation’s capitol was drastically reimagined by 1902’s McMillan plan, implemented primarily to improve the design of the city’s monuments and parks.

Nick Potts brings this evolution to life, highlighting some remaining vestiges of 19th century D.C. while explaining how the city changed around them – including the White House itself.