New images from above show that the Hemel Hempstead sinkhole has grown since it first appeared in Oatridge Gardens on Saturday.
A police cordon now surrounds the area so that nobody can get in and out.
The only way to photograph the sinkhole is from above - which is exactly what Stuart Marsh, who works at SKM Studio in The Nokes, Gadebridge, did today.
He said: “I flew one of our radio-controlled camera helicopters up there, and it’s huge.”
SKM studios covers Herts, Beds and Bucks, London and the south east.