Photos | Wedding Cake Rock in the Royal National Park crumbles, biggest warning yet for risk-takers

If this isn't a sign of a death wish waiting to happen, the next one might be too late.

Wedding Cake Rock in the Royal National Park is actively crumbling away, and it could be an early warning sign for tourists keen to jump the fence for a photo.

On Instagram this week, was a photo taken from the bottom of the cliffs, showing a fresh mountainous heap of rocks that had fallen from above.

It's a stark reminder for tourists that the delicate sandstone ledge, well-known for it's 'layer cake-like' formation, is dangerously fragile.

Geotechnical experts have previously warned that it could collapse into the ocean at any time.

National Parks has tried to deter people from stepping out onto the rock, with heavy penalties for people wanting to get as close as possible to the oceanfront.

Due to whale watching season, more people have been recently visiting the site, which is safe only if they remain well behind the boundaries.

A National Parks spokewoman says there are active rock falls at the site.

"It is precariously balancing on the edge of the cliff and is severely undercut," she said.

"There is also a large pile of rock fall debris at the bottom of Wedding Cake Rock that continues to accumulate."

She says the majority of visitors do the right thing, but a small minority are blatantly ignoring warning signs, "usually for one purpose only, to take a dangerous selfie."

"Wedding Cake Rock's appeal, the white layers of sandstone, are also what make this site so unstable. The pure white colour of the rock is caused by iron leaching, which makes the sandstone layers dangerously soft," she said.

"This is why NPWS has done a lot of work at this site to show that it is unsafe. We have put up a safety barrier around the site and are currently in the process of installing a safer fence."

"NPWS is calling on people to take responsibility for their own safety and spare a thought for emergency services people who put their lives at risk to undertake dangerous cliff rescues and retrievals should something go wrong.

"This is a beautiful location and we encourage people to come and look at the spectacular rock formation and take photos but the key is to enjoy the views from a safe distance, behind the fenced off area."