Mount Harriet National Park is a national park located in the Andaman and Nicobar Islands union territory of India. The park, established in 1969, covers about 4.62 km2 (18.00 mi2). Mount Harriet (383 metres (1,257 ft)), which is part of the park, is the third-highest peak in the Andaman and Nicobar archipelago next to Saddle Peak (732 metres (2,402 ft)) in North Andaman and Mount Thullier (568 metres (1,864 ft)) in Great Nicobar. The place is shown on the reverse side of Rupee 20 note in India. The park is named in commemoration of Harriet Tytler, the second wife of Robert Christopher Tytler, a British army officer, an administrator, naturalist and photographer, who were appointed Superintendent of the Convict Settlement at Port Blair in the Andamans from April 1862 to February 1864. Harriet is remembered for her work in documenting the monuments of Delhi and for her notes at the time of the Revolt of 1857 in India.