Green lagoon - Colombia Nariño.

Located in the crater of the volcano Azufral 4,700 m, is so named because of the large sulfur mine its depths, for which the lake takes an emerald green color. The lagoon does not own or Flora or fauna. Its waters are unfit for living things. His wealth is mine.

Possessed of great wealth as Azufral nature reserve on which rests the green lagoon, is located at the foot of the volcano one of the lowest activity. His plumed environment, owner of CV and swampy lagoon ecosystem holder.

   
The green color of the lagoon meets the concentrations of sulfur that is inside, the product of volcanic activity. Approximate height is 4,000 m.s.n.m. This volcano is highly mountainous area located in the so-called "knot of the Grass", where the Andes Mountains into three branches known as the Western Cordillera, Cordillera Central and the Cordillera Oriental mountain ranges.

Azufral volcano
The semi-active volcano is Azufral in the Andean region of the Colombian department of Nariño, 12 km from the town of Túquerres, via Samaniego. It has an elevation of 4070 meters.

    
It is considered as a nature reserve by the Board of Corponariño. It highlights three lagoons Green, La Negra and La Crystalline. With the resumption of volcanic activity of Galeras volcano, volcanoes Azufral and other departments of Nariño and Cauca began to be monitored by the Ingeominas, the state agency responsible for seismic and volcano monitoring in Colombia.