Nani Mau Gardens (20 acres) are commercial botanical gardens located at 421 Makalika Street, Hilo, Hawaiʻi on the island of Hawaiʻi, coordinates 19°40′20″N 155°3′17″W / 19.67222°N 155.05472°W. The gardens' name, Nani Mau, means "forever beautiful". They were established by Makato Nitahara and opened to the public in 1972.