Third crater, created in 1994 and containing green lake, Irazu Volcano, Parque Nacional Volcan Irazu, Cartago, Costa Rica, Central America

Irazu volcano, Irazu Volcano National Park, Cartago Province, Costa Rica, Central America

Irazu volcano, Irazu Volcano National Park, Cartago Province, Costa Rica, Central America

Third crater from the summit of Irazu, highest in Costa Rica at 3432m, last erupted 1994, Parque Nacional Volcan Irazu, Cartago, Costa Rica, Central America

Irazu volcano, Irazu Volcano National Park, Cartago Province, Costa Rica

Irazu volcano, Irazu Volcano National Park, Cartago Province, Costa Rica

Main crater Irazu Volcano with blue crater lake, Irazu Volcano National Park, Parque Nacional Volcan Irazu, Cartago Province, Costa Rica, Central America

Blue crater lake in the main crater of Irazu Volcano, Irazu Volcano National Park, Parque Nacional Volcan Irazu, Cartago Province, Costa Rica, Central America