Massive Sinkholes and Death

Croatia

Australia

South Africa
https://southafricanpalaeocaves.wordpress.com/2012/06/25/boesmansgat-mt-carmel-farm-south-of-kuruman-12-june-2012/

Death in a sinkhole

Where you will be swallowed by a sinkhole:

https://www.businessinsider.com/where-youll-be-swallowed-by-a-sinkhole-2013-3

h/t Asmodée