Great Salt Lake and Bonneville Salt Flats, USA40.7N 111.8W
This image shows the Great Salt Lake, located in the northern part of the U.S. state of Utah. Salt Lake City and its suburbs are located to the southeast and east of the lake, while the Bonneville Salt Flats lie to the west.
It is the largest salt water lake in the western hemisphere. In an average year the lake covers an area of around 1,700 square miles (4,400 km2), but the lake’s size fluctuates substantially due to its shallowness.
A railroad line — the Lucin Cutoff — runs across the lake, crossing the southern end of Promontory Peninsula. The mostly-solid causeway supporting the railway divides the lake into three portions: the northeast arm, northwest arm, and southern.
This causeway prevents the normal mixing of the waters of the lake due to the fact that there are only three 100-foot (30 m) breaches. This is why in this image the northern half of the lake appears much darker than the southern half.