This happened to Ray and Lynn McKay, who live near Brisbane, Australia.
The large circular pit appeared behind their house and, as the pit swirls terrifyingly, large chunks of soil can be seen slipping into the muddy water. Council engineers on site said initial investigations showed that a 100-year-old, 60m deep mine shaft had caused the hole.
The hole is getting bigger by the hour and the McKays have been advised to evacuate their home.
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