Mystery surrounds a gigantic sinkhole that appeared on a popular walking route just metres from a main road in Caerphilly. The void was found at around 9.30am on Saturday, January 14, on common land near Graig-y-Rhacca housing estate.
Janet Evans came across the "30 feet wide by six to 10 feet deep" hole while walking her dog in the greenery just off Addison Way road. The 60-year-old, who works in dam safety at Welsh Water, told WalesOnline at the time: "This is rather unusual because there is no water source up there. I looked over the brambles and lo and behold, there was a sinkhole.
"Judging by the look of the soil, it happened overnight. Part of my training is in soil erosion, where we learn about how the water can creep through the earth and cause erosion, so I knew what it was when I saw it. This wasn't just a pothole, this was a gigantic crater."
