Funny thing about limestone caves. They are created by flowing water that dissolves and erodes the limestone away. They often go on and on through very tight passages impossible for a man to get through and so impossible to explore.
Those limestone caves may lead to the sea.
If so, this dam may not fill up to expected levels or may not fill at all.
That would be funny. On the other hand, submerging stuff may be one way of preserving things from Islam for a future generation. And I think I left my guns there.
Interesting!