A New Zealand farm worker says he was in for the surprise of a lifetime this week when he went to round up cows for milking and instead discovered a massive sinkhole that had opened up overnight in a field.  The sinkhole located near the North Island town of Rotorua is at least six stories deep and two football

fields in length. It reportedly opened up after several days of heavy rain, the Associated Press reports. Farm manager Colin Tremain said he didn’t realize just how massive the hole was until he went out at daybreak to survey the sinkhole.  Volcanologist Brad Scott told Newshub television that it is the largest sinkhole he has ever seen. READ MORE