(Photo : Photo by DeAgostini/Getty Images) Salt Lake City is a city in Utah where you can find the Great Salt Lake where silvery blue waters stretch over the Utah desert, covering an area almost the size of Delaware during much of history. However, the biggest natural lake west of the Mississippi River has been decreasing for years. And, with a drought sweeping the American West, this year might be the worst yet. The lake's vibrant hues are caused by the fact that Great Salt Lake is hypersaline, meaning it is saltier than the ocean, and the high salinities sustain a variety of plants and animals that influence the light-absorbing properties of the water.