Belvedere Castle is a folly in Central Park in Manhattan, New York City. It contains exhibit rooms, an observation deck, and since 1919 has housed Central Park’s official weather station. Belvedere Castle was designed by Calvert Vaux and Jacob Wrey Mould in 1867. An architectural hybrid of Romanesque and Gothic styles, the design called for a Manhattan schist and granite structure with a corner tower and conical cap, a lookout over parapet walls beneath it.