Huila, the highest active volcano in Colombia, is a stratovolcano constructed inside an old caldera. The volcano is seen here from the SW, with the northern peak (La Cuesta) on the left and the lower southern peak on the right flanking Pico Central, the volcano's high point.

Courtesy Juan Carlos Diago, 1995 (Bernardo Pulgarín, INGEOMINAS, Colombia)..
This image is in the Public Domain.