Sinkhole at Tawi Atayr

This Sinkhole is somelike 100 meters deep and 500m in diameter. And we were told that there are water features on its bed which I'd love to see but unfortunately we were not able to make to its deep (lot of people shouting and enjoying echoes) because it was too steep to get down and tiring to get up...we just gave an eye to it.
(Sinkholes are erosional landforms, a closed depression that arises in the events ground water dissolves limestone, then an overburden falls into a gap, They are typical of karst.)