82ft-wide, 650ft-deep sinkhole appears near small town in Chile

 https://www.dailymail.co.uk/news/article-11072455/The-black-hole-Chile-82ft-wide-650ft-deep-sinkhole-appears-near-small-town.html

Any sudden opening or sinking can potentially have disastrous results. Especially if it's 200m deep.

https://thedigitallabyrinth.blogspot.com/search?q=Chilean+authorities+investigate+a+mysterious+large+sinkhole