Natural Bridge is an interesting natural formation caused by a combination of years of erosive forces. The waterfall formed a cave at it's base and in the creek above the swirling forces in a water pool forged a hole leading to the cave below and we are left with what appears to be a bridge. The cave also contains glow worms. The Natural Bridge Rainforest Circuit is located in Springbrook National Park off the Nerang-Murwillumbah Rd.