Too late for this year, but for future reference the fireworks are roughly over the Reflecting Pool, between the Lincoln Memorial and Washington Monument. Because there aren't any buildings south of there, plenty of Arlington sites have great views.
- The Doubletree Hotel has a revolving rooftop lounge
- The Potomac riverfront has very extensive parkland, with good views from north of I-395; walk there from Crystal City via the Mount Vernon Trail
- Long Bridge Park is a new park at the very north end of Crystal City with an elevated, tree-level viewing area
- A lot of people like to view the fireworks from hillsides behind the Pentagon (but not inside Arlington Cemetery), particularly the Air Force Memorial or Marine Corps (Iwo Jima) Memorial