Spotted Lake of Osoyoos was sacred to the First Nations of Okanagan Valley Indians. Osoyoos means narrowing waters in the Okanagan language, and is used to describe what happens to the lake. The lake is a saline endorheic lake, which means it is a closed body of water with no outflow or inflow from other bodies of water.The lake has high concentrates of many different minerals, and contains some of the highest quantities of magnesium sulfate, calcium and sodium sulfates in the world. There are also eight other lesser minerals in the water, including small amounts of silver and titanium. The minerals in the lake are very beneficial, and were mined during WWI to use in the making of ammunition for the war. The minerals are what give the lake its uniqueness. During the summer, as the water evaporates, spots are formed which have different colors depending on which mineral is most present. The spots crystallize and form walkways of different colors. The colors can be white, yellow, blue or green. The lake is on private property and they allow very little public access.