Central Park is an urban park in Manhattan, New York City. Central Park is the most visited urban park in the United States, with 40 million visitors in 2013,^[5] and one of the most filmed locations in the world. The park was established in 1857 on 778 acres (315 ha) of city-owned land. In 1858, Frederick Law Olmsted and Calvert Vaux, a landscape architect and an architect, respectively, won a design competition to improve and expand the park with a plan they titled the “Greensward Plan”. Construction began the same year and the park’s first area was opened to the public in the winter of 1858. Construction continued during the American Civil War farther north, and was expanded to its current size of 843 acres (341 ha) in 1873. Central Park was designated a National Historic Landmark by the U.S. Department of the Interior in 1962, which in April 2017 placed it on the tentative list for UNESCO World Heritage sites.^[7] The park, managed for decades by the New York City Department of Parks and Recreation, is currently managed by the Central Park Conservancy under contract with the municipal government in a public-private partnership. The Conservancy is a non-profit organization that contributes 75 percent of Central Park’s $65 million annual budget and is responsible for all basic care of the 843-acre park.