[grandinj]

Sounds like an opportunity to get an inland lake!

[fransje26]

They also have those, once they flood the open-pit coal mines they've been relentlessly digging...

[jodrellblank]

The Lake Peigneur diaster in 1980, drilling for oil in a lake bed in Louisiana they accidentally drilled down into a salt mine and drained the freshwater lake into it. That disolved the salt pillars supporting the mine's roof and created a 65 acre sink hole and backfilled the whole area from the saltwater bay.

https://en.wikipedia.org/wiki/Lake_Peigneur