For millions of years, in the Gold Coast Hinterland, the Nerang River has been flowing over a rock formation with a glowworm cave below. It acts as a natural bridge across the pool underneath. At some point the water has found a way through the rock, creating a hole, and a waterfall.

Below is a cropped picture of the waterfall as you approach the cave. Best viewed enlarged.

The full photograph of the approach to Natural Bridge: