The Nambung National Park in Western Australia has massive white sand coastal dunes that look like flour.
The Pinnacles—thousands of strange limestone formations that rise from the beach like petrified fingers—define Nambung National Park.
The pillars originated 25,000 to 30,000 years ago when Indian Ocean coastal winds scoured the sand.
Some formations are taller than wide and resemble columns, hence the name "Pinnacles."
The elements have fashioned certain columns like witches' hats.
The Pinnacles' limestone came from seashells from a marine-rich epoch.
The Pinnacles resemble a petrified forest, therefore some hypotheses propose they were formed by buried tree casts.
However, the prevailing idea is that when it rained, some of the calcium carbonate in the shell-sand seeped into the earth and hardened, slowly forming the Pinnacles.
When calcrete (sedimentary rock) caps are tougher than limestone, pinnacles with mushroom-like crowns form.