And in Afqa, the water comes thundering - through a huge opening - out of the mountain. It’s quite a sight if it is spring time, because the waterfall is quite impressive then. Right now we haven’t had much rain, and so the river is kind of slow.
Apparently you can climb into the cave some 3 kilometers, but there is not a whole lot of information I could find on that. A Belgian team did a nearby cave, Faouar Dara, also connected to an aquifer. From this source: Some 80% of precipitation occurs from November through February. The karst water emerges from five first-magnitude springs (Ain ez Zarqa (11m3/sec), Ain Anjar (max. 10m3/sec), Nabaa Ouazzani (max. 6m3/sec), Nabaa Arbaain (max. 3m3/sec) and Nabaa Barouk (max. 3m3/sec), plus hundreds of second- and third-magnitude springs, and thousands of smaller springs. More than two-thirds of the area of Lebanon (i.e. 6900 km2) is karstified and ( . . . ) karst features include many types of solutional shafts and galleries, grottoes, subsurface lakes and rivers and most types of speleothems. There are at least 15 aquifers in Lebanon, of which 14 are in karstified carbonate strata.
Update: Lalebanessa gave me an excellent link with cave info; The Afqa cave is 5260 meters long! And about those 67kWh; well, how am I supposed to know anout that stuff? With all the power cuts we're getting, 67 kWH goes a loooooong way as it is used in bits and pieces.