Global Volcanism Program | Image GVP-04287
Poás volcano is visible in this view from the NW with small gas plumes rising from the Botos cone in the center of the complex; the peak to its left is von Frantzius cone. The flank of Cerro Congo is across a saddle from von Frantzius on the far-left horizon. Two large calderas are at the summit, the youngest of which formed about 40,000 years ago.
Photo by Dick Berg, 1969 (courtesy of William Melson, Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.