The Presidio National Park contains approximately 870 structures from the former military post, of which 470 are considered to have historical value. The entire Presidio has been selected as a National Historic Landmark. Visitors to the park will find tiny remnants of the original San Francisco landscape as they explore the unique park grounds. Restoration projects are re-introducing resident flora to areas where they have long been wiped out. Native and introduced wildflowers abound in many of the natural areas during the spring and summer months. There is quite an intricate natural history and an abounding diversity of life on display, enhanced by the geography, climate and geology of the Presidio. The ecosystems located in this area are found in very few places on the earth. In addition to the beautiful plant life guests may come across an occasional animal sighting. Foxes and coyotes are sometimes seen on the grounds, although most wildlife goes largely unseen and prefer to prowl after dark. Bird enthusiasts love visiting the park because of its wide array of feathered species. Over 200 species of birds can be spotted throughout the year. The Presidio Park offers something for everyone. Whether visitors hike or bike through the grounds, view historic military buildings, explore the tidal areas, or take in a guided tour, the visit will be well worth taking.