The walk down to Natural Bridge is about 1km return on a track that is well laid and protected by railings and fencing as appropriate. There are many magnificent trees to be seen on this walk plus running brooks, moss and rainforest. Natural Bridge is in an arched cave where you see a waterfall. At night the cave is lit up by the green lights of thousands of glow-worms. Definitely worth a visit. There are areas in Springbrook National Park where you can camp.
If you are travelling to Natural Bridge follow the instructions provided by the National Park as follows:
"Exit the Pacific Motorway at Nerang (exit 69) and follow the Nerang–Murwillumbah Road for 30 km. Turn left into the park entrance. An alternative scenic route is 42 km via the Springbrook plateau from Mudgeeraba. From the Pacific Motorway take exit 80 from the south or exit 79 from the north and follow the Gold Coast–Springbrook Road to the plateau then turn right onto Pine Creek Road. Follow Pine Creek Road to the end and then turn left onto the Nerang–Murwillumbah Road. Natural Bridge can also be reached from Murwillumbah by following the Numinbah Road for 27 km. The scenic access roads are winding and should be travelled with care."