UPDATE: Unfortunately, stupid, loud people is why we can’t have nice things. As of 30 June 2018 (just a month after I went!) the Department of Crown Lands has erected a fence, closing the tunnel off to the public. Apparently, it’s because visitors were too loud, left rubbish and the glow worm population was being affected. I would have liked to have at least seen a rubbish bin and signs installed first to see if that would help, but sadly no.
There is talk that the gates may be opened at certain times to just restrict traffic to the area and give the glow worms a chance to recover from the idiots who were taking fire/flares/steel wool photos in the tunnel.
You might still get a photo of the worms after dark if you have a good zoom lens and use it through the fence rails but no more exploring of the tunnel for the time being.
This is so sad as it was such an amazing and unique place to visit, why can’t people just respect the places they visit. 😦
I always thought I’d have to go to New Zealand to see glow worms at the famous Waitomo Cave, but it turns out that we have them here in Australia!
There are a number of places where you can see them on the east coast but the most convenient would have to be the glow worms at the Helensburgh Tunnels, just 60km south of Sydney.