Volcán de Agua, Stratovolcano in Sacatepéquez Department, Guatemala.

Volcán de Agua is a stratovolcano with a perfectly symmetrical cone in Sacatepéquez Department rising 3,760 meters (12,336 feet) above sea level. Dense cloud forest covers its lower slopes while the upper sections transition into open grassland with scattered rocks.

Volcán de Agua is a stratovolcano that was active in the late Pleistocene between 80,000 and 10,000 years ago and has not erupted since. On 11 September 1541 a lahar, a destructive flood of water and mud, descended from the volcano and destroyed the second settlement of Santiago de Guatemala, now Ciudad Vieja. Governor Beatriz de la Cueva died in the disaster, and the capital was subsequently moved to Antigua Guatemala.

The Kaqchikel call the volcano Hunapú, meaning 'place of flowers', or Jun Ajpu', 'one hunter', a calendar date used to name sacred sites. Spanish settlers used Hunapú until the 1541 lahar, after which the name Volcán de Agua spread, contrasting with the neighbouring Volcán de Fuego, which the Kaqchikel call Chi Q'aq', 'where the fire is'.

The climb usually starts at Santa María de Jesús, the last village reached by road, and follows trails to the rim; the Maudslays made the same ascent in 1895, riding mules from the village. The crater is about 280 m across and 100 m deep, with frost and occasional snow at the top, so bring warm layers. The summit holds telecom antennas and pools of water in the crater hollow.

Though the name means Water Volcano, no crater lake ever existed at the summit as many travelers assume. The name instead comes from the massive amounts of water that rushed down during the 1541 disaster, burying the colonial town.