a scenic walk and drive trail winds past the ancient limestone pillars of the Pinnacles, some several metres tall. They're scattered across the desert in their thousands, creating an eerie, alien-like landscape. Some are as high as three and half metres, and some finish in a jagged point, while others have rounded domes, resembling tombstones. Made up of shells, the Pinnacles date back millions of years to an epoch when the sand was beneath the sea.