The conversion of the U.S. Sixth Army’s military installation at the Presidio into a 100 acre national park encompassed the restoration and rehabilitation of the natural landscape of wetlands, dune fields and beach along the San Francisco Bay waterfront. The design for Crissy Field reintroduced and amplified the natural and cultural features of the site while integrating a diversity of recreational uses on this enduring historical landmark. By superimposing many historical layers, the design is not a simple act of restoration to a particular period, but rather an interpretation of its past that establishes a platform for its future. Since its opening in 2001, Crissy Field has hosted millions of visitors, schoolchildren and residents as one of the most popular destinations of the Bay Area. Adaptive re-use of the historic hangars and enhanced public visitation and educational facilities has increased active use around the park, while at the center of this activity Crissy Field remains a powerful landscape, connected to the environment and natural systems of the Bay, both exhilarating and a respite for all who visit.