Sinkholes resulting from the presence of old, abandoned mine workings threaten the integrity of luxury homes in the NSW seaside town of Swansea Heads.

A sinkhole which is believed to measure as much as 20 metres in width and 10 metres in depth has opened up in the front yard of a three-storey home in Swansea Heads, threatening to topple the structure of the building itself. The couple who own the home returned in the evening…