East of the Province of Oriental Mindoro is the smaller province of Marinduque. Its population is 217,000 in six towns, of which Boac is the capital, totalling 959 sq. km. It has been a separate province since 1920. It has considerable mineral resources, but a disastrous leak of mine tailings in 1996 forced the closure of the copper mines. Its chief products are coconuts, rice, maize, fruits, vegetables, livestock, fish, wood, and the products of a number of small-scale industries. Off the coast are three small islands called the Three Kings, individually Gaspar, Melchor, and Baltazar, a favoured spot for day-trips and diving; a Spanish galleon was found off Gaspar in forty meters of water in 1981. It has yielded a wealth of archaeological treasure. Both provinces seem to offer sufficient wilderness, wildlife, and water to make many vacationers happy, but here has been little touristic development.