[T]he Lake Urmia in Northwestern Iran is the largest lake in the Middle East. The water of the Lake is heavily saturated with salt, causing a lack of any vegetation or fish. But the salt and mineral laden mud are reputed to have healing properties for skin and rheumatic afflictions.
Thus every year, mostly in late spring and summer people go there to treat themselves with the mineral rich black mud and to make picnic near the lake. Unfortunately the lake is in severe danger of drying-up as in the last 13 years the water level has decreased more than 6 meters.
The dehydration of the lake would mean a total change to the climate of Northwestern Iran from a moderate to a desert climate due to the high amount of salt in the lake.