Crissy Field is a former airfield, now a part of the Golden Gate National Recreation Area in San Francisco
, United States. Historically a part of the Presidio of San Francisco, Crissy Field was closed as an airfield, and eventually the National Park Service took control over it. While maintained by the United States Army, Crissy Field was heavily affected by the military's dumping of hazardous materials. In 1997, the park service began to clean up the area, and in 2001 the Crissy Field Center opened to the public. Photo by Carol Highsmith.