And they did: Landscape architecture is back. The MoMA exhibit (which runs from Feb. 25 to May 16) consists of 23 landscape-design projects that, in the words of curator Peter Reed, "reclaim and transform urban spaces—many derelict and in need of rehabilitation—into public parks and gardens." A typical example is Crissy Field, at the northern edge of Presidio National Park on San Francisco Bay (at right). The 100-acre site was previously a U.S. Army airstrip, which Hargreaves Associates has made into an urban park. The park includes a re-created tidal wetlands, a bayside promenade for joggers and bicyclists, a picnic spot, a restored beach, and an area for windsurfers. The result is an attractive combination of the natural, the naturalistic, and the man-made—like an Olmsted park, but greatly simplified and geared to today's active public.