( غار سهولان ) Sahoolan ( Sahulan or Sahoulan )water cave locates 43 km to the southeast of Mahabad on the road to the city of Boukan in the northwestern of Iran, is the Country's second largest water cave after Alisadr cave in Hamedan.
The name of the cave is taken from the village in which it is located, but it is also called by local people `Dove Nest'. Doves are seen all around the cave, given that they are the major residents of Sahoolan.
Being situated at a height of 2,000 meters from the sea level, this tourist spot is cool in summer and freezing in winter. Sahoolan is a Kurdish word meaning freezing and has been chosen to describe the climatic condition of the area. The surrounding high mountains with their high-flown peaks and fully virgin deep valleys add to the beauty and majesty of this amazing natural attraction. This charming natural phenomenon includes the waterway and dry part which can be visited by boat and on foot, respectively.
Inside the cave is quite humid and dark, but hundreds of flashlights installed in it provide enough light to enable visitors to look at the interior of this rare tourist attraction.