Large outdoor area set aside for recreation. The earliest parks were hunting grounds of the Persian kings; such reserves became shaped by riding paths and shelters. A second type of park derived from the open-air meeting places of Greece, where the functions of an area for exercise, social concourse, and athletes' training ground were combined with elements of a sculpture gallery and religious centre. Parks of post-Renaissance times featured extensive woods, raised galleries, and often elaborate aviaries and cages for wild animals. What often differentiates present-day parks from parks of the past is their accommodation for active recreation; facilities may include outdoor theatres, zoos, concert shells, concessions for dining and dancing, amusement areas, boating areas, and areas for sports. See alsonational park.