https://youtu.be/2o3Y2vgurUk Alcatraz Island, San Francisco, California . Alcatraz Island is a small island 1.25 miles (2.01 km) offshore from San Francisco, California, United States. The island was developed in the mid-19th century with facilities for a lighthouse, a military fortification, and a military prison. In 1934, the island was converted into a federal prison, Alcatraz Federal Peniten..

https://youtu.be/3LLaPPMBIBI The Golden Gate National Recreation Area (GGNRA) is a U.S. National Recreation Area protecting 82,116 acres (33,231 ha) of ecologically and historically significant landscapes surrounding the San Francisco Bay Area. Much of the park is land formerly used by the United States Army. GGNRA is managed by the National Park Service and is the most visited unit of the Natio..

https://youtu.be/pndhtzydZW0 Milagra Ridge is a 275-acre (111 ha) open space park that is an isolated island ecosystem, located about 7 miles (11 km) south of San Francisco, between the cities of Pacifica and Daly City. It was first inhabited by the Ohlone indigenous people, and was later claimed by Spanish settlers and Mexican ranchers. The United States Army acquired the land in the late 1930s..

https://youtu.be/kKaI5Kr0BEA Presidio of San Francisco . The Presidio of San Francisco (originally, El #Presidio Real de San Francisco or The Royal Fortress of Saint Francis) is a park and former U.S. Army post on the northern tip of the San Francisco Peninsula in San Francisco, California, and is part of the Golden Gate National Recreation Area. It had been a fortified location since September ..

https://youtu.be/kKaI5Kr0BEA Presidio of San Francisco . The Presidio of San Francisco (originally, El #Presidio Real de San Francisco or The Royal Fortress of Saint Francis) is a park and former U.S. Army post on the northern tip of the San Francisco Peninsula in San Francisco, California, and is part of the Golden Gate National Recreation Area. It had been a fortified location since September ..

https://youtu.be/IjDf1fQabhw The Marin Headlands has an amazing richness of history and biological diversity . The Marin Headlands is a hilly peninsula at the southernmost end of Marin County, California, United States, located just north of San Francisco across the Golden Gate Bridge, which connects the two counties and peninsulas. The entire area is part of the Golden Gate National Recreation ..

https://youtu.be/i7OhS2qO_QU Golden Gate National Recreation Area . Golden Gate National Recreation Area was established by Congress in 1972 to offer a national park experience to a diverse urban population, while preserving and interpreting the park's outstanding natural, historic, scenic, and recreational values. . One of the largest urban parks in the world, GGNRA welcomes over 17 million vis..

. Muir Woods National Monument is part of California’s Golden Gate National Recreation Area, north of San Francisco. It’s known for its towering old-growth redwood trees. Trails wind among the trees to Cathedral Grove and Bohemian Grove, and along Redwood Creek. The Ben Johnson and Dipsea trails climb a hillside for views of the treetops, the Pacific Ocean and Mount Tamalpais in adjacent Mount T..

. Sweeney Ridge, is a 1,200-acre (5 km2) hilly hiking area of ridges and ravines between San Bruno and Pacifica, California, about a 25-minute drive south from San Francisco. The ridge's 1,200-foot-high summit, covered with coastal scrub and grassland, slopes down to San Francisco Bay on the east and to the Pacific Ocean on the west. The ridge is part of the Golden Gate National Recreation Area...