A little beyond Dog River, the road leads to the Jeita Grotto, one of the world’s most extensive grottos and river chambers. Fashioned by millions of years of erosion, the Jeita Grotto is a spectacle that defies description. Stalagmites and stalactites meet one another in a fantastic decor where mirages of the rocks are reflected in the clear water of the subterranean basin. The modern discovery of the underground river of Jeita dates to 1836 and is attributed to Reverend William Thomson, an American missionary who ventured some 50 meters into the cave. In summer you can visit both the upper and lower galleries while enjoying the refreshingly cool temperature inside the caves. The lower section is sometimes closed in winter when the water level is high.