Ocean Beach runs along the Pacific Ocean shoreline, but is not suitable for swimming because the waters off the coast are cold and have deadly rip currents. Fort Funston, a former coastal fort on the Southwestern shore is popular with both dog owners and hang gliders. Baker Beach occupies a picturesque setting just west of the Golden Gate Bridge. The biggest and best-known park is Golden Gate Park, stretching from the center of the city to the Pacific Ocean. Once covered only in grass and sand dunes, the park is planted with thousands of non-native trees and plants and is rich with attractions including the Conservatory of Flowers, the Japanese Tea Garden, and Strybing Arboretum. The Presidio, a former military base, and its Crissy Field section, restored to its natural salt marsh condition, are part of the Golden Gate National Recreation Area, which includes Alcatraz, and other regional parks. Buena Vista Park is the city's oldest, established in 1867. Lake Merced is a fresh-water lake surrounded by parkland.
The City and County of San Francisco is the fourth most populous city in California and the 14th most populous city in the United States, with a 2007 estimated population of 764,976. One of the most densely populated major American cities, San Francisco is part of the much larger San Francisco Bay Area, which is home to approximately 7.2 million people. The city is located on the tip of the San Francisco Peninsula, with the Pacific Ocean to the west, San Francisco Bay to the east, and the Golden Gate to the north.
