The Rio de Janeiro Botanical Garden or Jardim Botânico is located at the Jardim Botânico district in the "Zona Sul" (South Zone) of Rio de Janeiro.
The Botanical Garden shows the diversity of Brazilian and foreign flora. There are around 6,500 species (some endangered) distributed throughout an area of 54 hectares, and there are numerous greenhouses. The Garden also houses monuments of historical, artistic and archaeological significance. There is an important research center, which includes the most complete library in the country specializing in botany with over 32,000 volumes.
It was founded in 1808 by John VI of Portugal. Originally intended for the acclimatisation of spices like nutmeg, pepper and cinnamon imported from the West Indies, the Garden was opened to the public in 1822, and is now open during daylight hours every day except December 25th and the 1st of January.
The 140-hectare park lies at the foot of the Corcovado Mountain, far below the right arm of the statue of Christ the Redeemer and contains more than 6,000 different species of tropical and subtropical plants and trees, including 900 varieties of palm trees. A 750 m line of 134 palms forms the Avenue of Royal Palms leading from the entrance into the gardens. These palms all descended from a single tree, the Palma Mater, long since destroyed by lightning. Only about 40% of the park is cultivated, the remainder being Atlantic Forest rising up the slopes of Corcovado. The park is protected by the Patrimônio Histórico e Artístico Nacional and was designated as a biosphere reserve by UNESCO in 1992.