Agua (Sp., water), Volean de, a mountain in Guatemala, Central America, 25 m. S. W. of the capital, New Guatemala. In form it is a graceful cone, its base extending over nearly all the western part of the valley of Guatemala, The traveller Stephens estimates its altitude at ' 14,450 feet above the level of the sea. Cultivated fields surround the base, and a belt of forest and verdure extends to the summit. The crater-like hollow on the top measures 140 by 120 yards. Its name is derived from the fact that occasionally torrents of cold water flow out of its northern side. The volcanic mountain of Pacaya lies to the S. E., and that of Guatemala to the N. W.