Birds diving into the crater lake at El Junco, San Cristobal, Galapagos.

Laguna El Junco (San Cristobal Highlands Tour)

In the highlands of San Cristobal Island is El Junco Crater Lake.  Galapagos Islands are volcanic and San Cristobal is one of the oldest islands so its volcanoes have long since become extinct.  This volcanic crater is now filled with the largest source of fresh water in the Galapagos Island chain.