Once an Army base, the Presidio of San Francisco became a national park in 1994. Since that time, many acres of contaminated Army landfills and degraded lands have been remediated and restored to wetlands, sand dunes and grasslands that now support thriving populations of plant and animal species, some of which exist nowhere else in the world. With the return of healthy habitat comes new and exciting opportunities to bring back locally extinct plants and wildlife to this urban park area. Join our Presidio ecologists as they discuss the transformation of nature in the Presidio's past, present and future.