Pica is a Chilean town and commune in Tamarugal Province, Tarapacá Region. Situated in the inland of the Atacama Desert on an oasis, Pica is famous for its small and unusually acidic limes known as Limón de Pica. The town has a communal hot spring with a surface temperature of 40 °C, which makes it a popular bath place in the middle of the desert. It has hotels and all basic services. The town lies four kilometers to the northeast of the oasis village of Matilla.