Playground to the south and the Seneca Village site, occupied by the Mariners Gate playground, to the north. Turtle Pond's western shore contains Belvedere Castle, Delacorte Theater, the Shakespeare Garden, and Marionette Theatre. The section between the 79th Street transverse and Terrace Drive at 72nd Street contains three main natural features: the forested Ramble, the L-shaped Lake, and Conservatory Water. Cherry Hill is to the south of the Lake, while Cedar Hill is to the east. The southernmost part of Central Park, below Terrace Drive, contains several children's attractions and other flagship features. It contains many of the structures built in Central Park's initial stage of construction, designed in the Victorian Gothic style. Directly facing the southeastern shore of the Lake is a bi-level hall called Bethesda Terrace, which contains an elaborate fountain on its lower level. Bethesda Terrace connects to Central Park Mall, a landscaped walkway and the only formal feature in the Greensward Plan. Near the southwestern shore of the Lake is Strawberry Fields, a memorial to John Lennon who was murdered nearby; Sheep Meadow, a lawn originally intended for use as a parade ground; and Tavern on the Green, a restaurant. The southern border of Central Park contains the "Children's District", an area that includes Heckscher Playground, the Central Park Carousel, the Ballplayers House, and the Chess and Checkers House. Wollman Rink/Victorian Gardens, the Central Park Zoo and Children's Zoo, the Arsenal, and the Pond and Hallett Nature Sanctuary are nearby. The Arsenal, a red-brick building designed by Martin E. Thompson in 1851, has been NYC Parks' headquarters since 1934. There are 21 children's playgrounds in Central Park. The largest, at , is Heckscher Playground. Central Park includes 36 ornamental bridges, each of a different design. The bridges are generally designed in the Gothic Revival or Romanesque Revival styles and are made of wood, stone, or cast iron. "Rustic" shelters and other structures were originally spread out through the park. Most have been demolished over the years, and several have been restored. The park contains around 9,500 benches in three styles, of which nearly half have small engraved tablets of some kind, installed as part of Central Park's "Adopt-a-Bench" program. These engravings typically contain short personalized messages and can be installed for at least $10,000 apiece. "Handmade rustic benches" can cost more than half a million dollars and are only granted when the honoree underwrites a major