Global Volcanism Program | Image GVP-10174
This vegetated island is Cerro Grande, a post-caldera lava dome in the SW side of Coatepeque caldera. The partially submerged dome has a basal diameter of about 2.5 km and a volume of about 0.5 km3. The smaller San Pedro Island with one tree is exposed during low lake levels.
Photo by Lee Siebert, 2002 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.