This unique body of water is located in the Osoyoos Indian Reserve in British Columbia, Canada. It is a saline endorheic alkali lake that is known for its natural phenomenon of having numerous spots of different colors, caused by the high mineral content of the water. The
From Wikipedia
Spotted Lake — known as Lake Khiluk in the Nsyilxcən language — is a saline endorheic alkali lake located northwest of Osoyoos in the eastern Similkameen Valley of British Columbia, Canada, accessed via Highway 3.