| Laguna de los Cristales | |
| Pushpin Map: | Chile |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location in Chile |
| Location: | Cachapoal Province, O'Higgins Region |
| Coords: | -34.5679°N -70.5136°W |
| Type: | Lake |
| Basin Countries: | Chile |
| Area: | 0.486km2 (2022) |
| Elevation: | 2286m (7,500feet) |
Laguna de los Cristales (lit. Lagoon of the Crystals) is a small lake located in the Andes of O'Higgins Region in Central Chile. The lake is natural in origin, but its water level was raised by a dam inaugurated in 1976 aimed to provide water for irrigation in Rengo.[1] Local folklore tells of a treasure, an entierro, that is hidden in the bottom of the lake.[2]