La Yeguada, also known as Chitra-Calobre, is a massive volcanic complex in west-central Panamá north of the Azuero Peninsula that was active from the Miocene into the Quaternary. The youngest major feature of La Yeguada is located within a large fault-bounded horst that forms the high point of the volcanic complex east of Laguna La Yeguada. The latest eruptions took place from the northern part of the horst about 220,000 years ago at Cerro Corero lava dome (also known as Cerro de la Charca), north of El Castillo. The youngest feature of the La Yeguada complex is the Media Luna cinder cone, which was erupted through Tertiary ignimbrite deposits at the NW side of the complex. The oldest peat layer within a small lake dammed by a basaltic lava flow originating from the cone was radiocarbon dated at about 300-350 years ago, but later dating has shown that flow was erupted about 45,000 years ago, and that the La Yeguada complex has not had Holocene eruptions. Warm springs are scattered throughout the complex, and the Chitra-Calobre geothermal field is one of three areas in Panamá that have been the object of intensive geothermal exploration.