Global Volcanism Program | Image GVP-04277
The Arenal Observatory Lodge was constructed at the site of a joint OVSICORI-UNA/Smithsonian Institution volcano observatory established on the SSW flank. The observatory building itself, out of view to the right, was used for seismic monitoring and visual documentation of the frequent eruptive activity from Arenal. This photo was taken in 1992.
Photo by William Melson, 1992 (Smithsonian Institution).