Introduction to Natural Bridge Park: Natural Bridge Park (Natural Bridge) is home to the world's rare glowing worms. Glowing worms (Clow-worm) are only found in a few places in New Zealand and Australia. They were once called one of the eight wonders of the world. This insect is similar to a mosquito and has a lifespan of only 1 to 5 days. Both male and female have a light-emitting organ at the top of their tail that emits bluish-white light.