Utah, USA. Looking northwesterly from Buffalo Point on Antelope Island, Antelope Island State Park. The Great Salt Lake is the largest lake by area (but _not_ by volume!) in the US west of the Mississippi River, and the largest saline lake in the western hemisphere. Its salinity is variable but ranges as high as 27%--by comparison, mean sea water is about 3.3%. It's far too salty for fish but supports a brine shrimp(!) fishery. It's the vastly shrunken remnant of Pleistocene Lake Bonneville, an enormous freshwater lake that covered much of the eastern Great Basin.
Antelope Island is connected to the mainland by an automobile causeway. It's not an "island" at this water level, being connected to the mainland to the south and east by alkali mud flats.