Laguna del Diamante (Spanish for "lake of the diamond") is a lake located in the province of Mendoza, Argentina, in the San Carlos Department, some 198 km from Mendoza. It covers a surface area of about 14.1 km² and is one of the largest freshwater resources in the Province. Nearby is Maipo volcano. The volcano and its reflection in the lake forms diamond-shape image, which gives the lake its name. It is known for its stunning beauty.