Start: Lithgow Station
End: Lithgow Station
Total distance: 95km
Strava link
The Newness Plateau lies behind Lithgow in the Blue Mountains. A 40km dirt track from Lithgow runs along the plateau to the Glowworm tunnel from where you can drop down into the Wolgan Valley. There are lots of little side roads to amazing places like Lost City.
Lost City is a beautiful viewpoint over rock pagodas that look like skyscrapers of an abandoned city. There is not a soul there and you really feel like you are at the end of the world.
Road to Lost City
Lost City
The Glowworm Tunnel is more frequented by people – an old train tunnel connecting the Newness Plateau to the Wolgan Valley. Glowworms live in the tunnel, and in the middle, where it is completely black, they slowly appear as your eyes get adjusted to the (lack of) light.
Road to the Glowworm Tunnel
Road to the Glowworm Tunnel
Glowworm Tunnel
Glowworm Tunnel
Wolgan Valley
Returning to Lithgow, you climb up to a beautiful view looking back to the Wolgan Valley.
arctic-cycler.com 
Ah the tunnel!
Lots of tunnels..