The Berkeley campus encompasses approximately , though the "central campus" occupies only the low-lying western of this area. Of the remaining acres, approximately are occupied by the Lawrence Berkeley National Laboratory; other facilities above the main campus include the Lawrence Hall of Science and several research units, notably the Space Sciences Laboratory, the Mathematical Sciences Research Institute, an ecological preserve, the University of California Botanical Garden and a recreation center in Strawberry Canyon. Portions of the mostly undeveloped, eastern area of the campus are actually within the City of Oakland; these portions extend from the Claremont Resort north through the Panoramic Hill neighborhood to Tilden Park.