This story now
IN OMG! ON 10 Sep, 2015
For a long period of time now, Russia is witnessing a very grave problem of sinkholes appearing every now and then and many expanding continually. Much of infrastructure has been disrupted, mines locked and many other activities at standby. Some small towns had to be completely evacuated to prevent any losses of lives.
And it's situated on top of working mines, closed for obvious reasons, which are surprisingly stable. Although mining is not the reason behind it.