Game reserves are large areas of land where wild animals live safely or are hunted in a controlled way for sport. Many game reserves are located in Africa. Most are open to the public, and tourists commonly take sightseeing safaris. In a game reserve, ecosystems are protected and conservation is usually key. Indigenous wildlife in its natural habitat help in providing an environment where growth in numbers at a natural rate can occur. The biggest attraction is the Big Five game (Africa) - rhinoceros, elephant, buffalo, leopard and lion, named so because of the difficulty in hunting them.