Lac Flammarion is a volcanic crater lake in Guadeloupe, which straddles the communes of Gourbeyre and Capesterre. It is situated at an altitude of , and measures  by .

The lake is entirely filled by rainfall, which is usually about  per year. The water is acidic with a pH ranging between 4.5 and 5. Its temperature ranges between 18 and 19 °C.

Flammarion is free of vegetation, but rather rare species that prefer the acidic conditions grow on its shores, such as ,  and , an endemic species of rush.

The crater was named by the famous alpinist Mr. Camille Thionville, chef du service de l'Enregistrement et des Domaines.

References

Bodies of water of Guadeloupe
Flammarion