National parks are extensive forests established to protect nature and biodiversity. They prohibit human activities and development to allow organisms to live freely. Some of India's national parks mentioned are Eravikulam National Park in Kerala, which protects mountain rainforests and is a potential UNESCO site, Jim Corbett National Park in Uttarakhand established in 1936 as India's first national park to protect tigers, and Bandipur National Park in Karnataka known for its wildlife and dry deciduous forests as part of the Nilgiri Biosphere Reserve.