Biodiversity parks
National parks

A park is a protected area, in its natural or semi-natural state or planted, and set aside for human recreation and enjoyment. It may consist of, rocks, soil, water, flora and fauna and grass areas.
Wilderness parks are intact and undeveloped areas used mainly by wild species. Many parks are legally protected by law.
Protected wilderness zones are required for some wild species to survive. Some protected parks focus mainly on the survival of a few threatened species, such as gorillas or chimpanzees.
A national park is a reserve of land, usually, but not always declared and owned by a national government, protected from most human development and pollution. National parks are a protected area of IUCN category II. The largest national park in the world is the Northeast Greenland National Park, which was established in 1974.

Sub-national parks

In Federal systems, many parks are managed by the local levels of government, rather than by the central government. In the United States these are called state parks and in Canada provincial or terriorial parks, except in Quebec where they are known as National Parks

Urban parks

A park is an area of open space provided for recreational use, usually owned and maintained by a local government. Parks commonly resemble savannas or open woodlands, the types of landscape that human beings find most relaxing. Grass is typically kept short to discourage insect pests and to allow for the enjoyment of picnics and sporting activities. Trees are chosen for their beauty and to provide shade.
Park can be divided into active and passive recreation. Active recreation is that which require intensive development and often involves cooperative or team activity, including playgrounds, ball fields and skateparks. Passive recreation is that which emphasizes the open-space aspect of a park and which involves a low level of development, including picnic areas and trails. Organized football matches take place in parks.

Private parks
Private parks are owned by individuals or businesses and are used at the discretion of the owner. There are a few types of private parks, and some which once were privately maintained and used have now been made open to the public.
Hunting parks

Hunting parks originally referred to an area maintained as open space where residences, industry and farming were not allowed, often originally so that nobility might have a place to hunt. These were known for instance, as deer parks (deer being originally a term meaning any wild animal).