In his commentary on Job 28:7, Rabbi Meir Leibush Malbim (1809-1879) writes (my translation):
In 5581 (1820/21) a tall mountain in France collapsed, and left behind a deep chasm full of water. This was caused by a water channel that originated in a spring at the top of the mountain and emptied into a subterranean cavity under it...
(and goes on to explain the fluid dynamics involved).
What mountain was that? (It's of course possible that the date was transcribed wrongly, so it may have actually occurred in some other year around that time. But searching using various terms hasn't gotten me anywhere.)