We visited Helensburgh on a trip from The Hunter Valley to Jervis Bay, which made a fun, if a little out of the way stop. The main reason for going there was to see the Glow Worm Tunnel, an old railway tunnel, now disused but home to glow worms. In the past the tunnel was full of water, which added to rumours that it had a steam train in it. After draining, this was found to be untrue! You can however still see a good length of platform when entering the tunnel.
Access to the Helensburgh Glow Worm Tunnel
For four weeks each year, the tunnels close, to allow the colony of glow worms time for breeding. During this time the gates are locked closed and there is a $1,000 fine. Note the locals love this tunnel, and want to keep it in good condition, so respect for when it is closed is important. You will need to see the website for closing dates.
Just outside the tunnel is a small car park, off the road, which leads to the entrance through a gateway. A sign at the gate reminds visitors of the fragile nature of the glow worms’ environment and asks that lights and noise be kept to a minimum. This is only opened for a short period of time during the day, as people were climbing the fence to enter.
The Tunnel and the Glow Worms
Overgrown with ferns the ground near the entrance to the old tunnel was very wet when we visited. If visiting after rain, the tunnel can become flooded so use caution when entering. Some old train tracks are visible and can be followed into the tunnel, but after 50m, they disappear. The floor of the tunnel is muddy, and footing can be slippery, so wear appropriate footwear. We took good hiking boots even though it was only a short walk, glad we did.
After walking in until the outside light disappeared and waiting patiently, the glow worms came out for an amazing display.
Another great glow worm tunnel exists at Newness in the Wollemi National Park.
The Helensburgh Glow Worm Tunnel 
Tunnel Entrance 
Looking Down the Tunnel From Inside 
Looking Back Out of the Tunnel
To see what else there is to do in New South Wales, please see some of our other stories.
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