Wedding Cake Rock, Sandstone cliff in Royal National Park, Australia.

Wedding Cake Rock is a white sandstone formation in Royal National Park, 5.1 km along the Coast Track from Bundeena. Its top is cut into flat, stacked blocks with a thick squared overhang; below, the face drops in rough layered ledges of cream, tan and grey stone. Low shrubs grow on the left of the flat top, where a thin metal railing runs along the edge.

Geological surveys in 2015 revealed the formation could collapse within a decade as erosion weakens the base. Authorities then closed public access in May of that year.

Visitors use the name because the formation resembles a multi-layer cake sitting on a plate. The rock is now admired from a distance after social media photos turned it into a widely shared attraction.

Access requires a walk of about 5 kilometers (3.2 miles) from Bundeena along the park's coastal trail. Crossing the safety barrier risks fines from park management.

The pale color comes from iron leaching out of the rock layers while surrounding cliffs appear in shades of orange. This chemical change makes the rock look as though it belongs somewhere else.