Steam rises from fumaroles in an area of hydrothermally altered ground east of the summit of Casita volcano. The forested slopes in the middle distance to the NE are the flanks of La Pelona caldera, whose floor forms the light-colored area at the right-center. The western part of the caldera was buried by lava flows and pyroclastic material from Casita.

Photo by Lee Siebert, 1998 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

San Cristóbal