crankypants15

The whole state of Florida is on a bed of limestone, which is softer and more easily eroded by water. And it has lots of sink holes. And it will have many more in the future.

B3bomber

We keep draining groundwater and the earth caves in when we do that.

MrPim

Mole.People

PhilaFerret

More. People (affected).

Mumbleberry

Geology.