A huge sinkhole has appeared at a coastal beauty spot revealing a hidden underground beach.
The natural phenomenon, called Souter Hole, first appeared as a small sinkhole in 2003 and it has widened every year since.
It has grown so big a hidden beach has been revealed with the sea forcing its way through a crack in one of the cliff walls in Whitburn, near Sunderland.
Erosion and landslips have lead to the gaping 40ft-wide hole.
The National Trust, which manages the cliff path around the hole, are warning walkers and dog owners to avoid the area.
Former GP and beach artist Clair Eason captured the true extent of the sinkhole while exploring the coastline near her home.
“This deep sink hole near Souter Point, South Shields, began as a small hollow a few years ago," she said.
“It’s growing into a huge beast, adding even more drama to the rugged coastline.”
The National Trust has been forced to cordon off the sinkhole which is close to the cliff coast path.
A spokesperson said: “We want all of our visitors to have an enjoyable, relaxed and safe visit to Whitburn Coastal Park.
“By its nature the coastline is constantly changing, with some areas particularly prone to erosion and landslips.
"This sink hole first appeared around 2003 and is regularly surveyed.
“We have put up fencing and warning signs around this sink hole, which is away from the main path running along the cliff tops of The Leas and Whitburn Coastal Park, known locally as The Wherry."
The National Trust urged people to pay attention to the signs and stick to the main paths.
Warning signs are in place at key points along the cliff edges and at information panels in each car park.
