A HUGE sinkhole at a coastal beauty spot in the north of England has revealed a hidden underground beach.A HUGE sinkhole at a coastal beauty spot in the north of England has revealed a hidden underground beach. However, the hole has grown wider every year since its discovery. The sinkhole is now so big a hidden beach has been revealed with the sea forcing its way through a crack in one of the cliff walls. The clifftop region is managed by the National Trust they have warned walkers and dog owners to avoid the area. Beach artist and former GP...