If you are interested in aircraft spotting, or just like the thrills of taking a photo of jumbo jets fly as low as 100 ft overhead, Gravelly Point Park near Washington DC is the place to visit. It is a small park alone the Virginia side of the Potomac River. It is only a few hundred feet from the runway of Reagan National Airport. It has plenty of parking, large fields for sports, trails for biking, picnic tables, and a boat ramp. It is a great place to visit.
Getting there is a little tricky though. It doesn’t seem to have a street address. To map it and get driving directions on Google Maps, use the GPS coordinate “N38.8642,W77.0400” as the address. Remember you need to head north on George Washington Memorial Parkway to be able to get into the park.