Washington D.C. delivers American political and cultural capital with free museum access. The National Mall concentrates monuments and Smithsonians in walkable density. The Capitol and White House anchor political tourism with varying access. Free Smithsonian museums could occupy weeks of exploration. Georgetown provides historic neighborhood atmosphere removed from monument tourism. Arlington Cemetery deserves respectful visit for American military history. Cherry blossom season (late March-early April) transforms the city. The Metro system covers key areas efficiently. Tipping culture and restaurant prices match American standards. Congressional timing affects accommodation availability.