Dulles International Airport - You Are Here

Visit the National Building Museum, where you can learn about American innovation in architecture, engineering, and design.
http://www.nbm.org/about-us/about-the-museum

Take a guided tour of the U.S. Capitol, whose neoclassical architecture was championed by Thomas Jefferson.
http://www.uscapitol.gov

For a view of another interesting modern structure in D.C., visit the Kogod Courtyard at the National Portrait Gallery:
http://www.npg.si.edu/inform/courtyard.html