Startled authorities have begun investigating a huge sinkhole that mysteriously appeared near a copper mine.
Geology specialists in northern Chile have started inspections after the large hole, thought to measure around 25 metres (82 feet) in diameter, opened near the Canadian Lundin Mining site at Alcaparrosa over the weekend.
The sinkhole, which is about 200 metres (656 feet) deep, is located about 665 kilometres (413 miles) to the north of the nation's capital Santiago.
