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Staircase leading into the volcano

Cuexcomate is an inactive geyser in Puebla city, Puebla state, Mexico. It stands at 13 metres (43 feet) with a diameter of 23 metres (75 feet) and is thought to be the biggest geyser on Earth.[1][2]

Historically it has been cited that the geyser was formed before the 1064 eruption of the Popocatépetl, an active volcano and the second highest peak in Mexico, which likely activated geothermal spring circulation that cut upward through Mesozoic limestone and deposited the geyser and the springs around it.[3] The geyser's rock composition is 99% calcite, differing thus from typical silica sinter deposits.[3]

Cuexcomate has been called 'The Smallest Volcano of the World' because of the popular belief that it was indeed a volcano, based only on the shape of the structure. Today, there is a metal spiral staircase that allows tourists to descend into the excavated interior of the structure, where cultural events are even performed.

The name is from Nahuatl for "clay pot" or "place to keep". location: 19 04 14.02N, 98 14 06.92W


  • Geyser Type: calcitic chemical deposit
  • Height: 13 meters.1metre
  • Crater Diameter: 8 meters.
  • Base Exterior Diameter: 23 meters.
  • Weight: approx. 400 tons.
  • Elevation: 13
  • Mode of formation: emanating geothermal waters with occasional high-pressured bursts


A description of the Cuexcomate Volcano from the year 1585 says: "at one league from this city, close to the bridge that they call Cholula, there is in a large grassland... in circular shape, a rock of 6 or 7 estados high, at the top of which there is a great mouth as if it were made to hold a waterwheel. The which is very deep, and at the bottom of which there is foul smelling water, a very important thing to note: there they say that in the heathen days they threw in (indios) natives to be sacrificed to their idols."

The crater of Cuexcomate is an empty cone of an extinct geyser.


It was formed by hydrothermal circulation previous to the 1064 eruption of Popocatépetl, located in the town of La Libertad.

It was said that in ancient times, the people of Puebla threw the bodies of suicide victims into the crater, because they didn't deserve to be mourned or buried.

During this same time, the people living around the geyser were said to be 'children of the devil' or 'under the rule of the devil', because of Cuexcomate.

It is believed that of the various tunnels that cross under the city of Puebla, Puebla, one travels from the hill of Loreto to the hill of San Juan (now the hill of La Paz) and from there travels down to the hill Cuexcomate, afterward crossing under the Atoyac river and ending in the Archaeological zone of Cholula and its pyramids.

On March 11, 1943, the town of La Libertad was incorporated into the city of Puebla, Puebla.

In the chronology of historical events, on November 27, 1970 a plaque was placed to commemorate the founding of the town around the sides of the Cuexcomate geyser.


The geyser is found at the intersection of 2 Poniente (west) and 3 Norte (north), in the Colonia La Libertad, Puebla.

There are spiral metal stairs that allow one to descend to the interior of the crater.

See also[edit]



  1. ^ Peakware. "El Cuexcomate". Accessed 5 August 2006.
  2. ^ Traveling Well. "Traveling Well to Mexico". Accessed 5 August 2006.
  3. ^ a b GSA Abstracts. "GSA Section Meeting Abstracts". Accessed 20 January 2012.

Coordinates: 19°04′14″N 98°14′07″W / 19.07056°N 98.23528°W / 19.07056; -98.23528