Using Sydneys tunnels

Explore Sydney's ghost tunnels

Cable tunnels under Sydney - Utility Magazine

Mysteries, Ghosts and Urban Legends on Sydney Harbour

Sandvik machines go to work at Sydney's Western Harbour Tunnel - GeoDrillingInternational

The Sydney Harbour Tunnel

Sydney tunnel boring breakthrough a record feat - Rail Express

Sydney's $5BN Tunnel U-Turn

Sydney's Road Tunnels

Sydney's secret tunnels exposed

On This Day In Australia: In 1992, the Sydney Harbour Tunnel officially opened – Craig Hill Media

Sydney Harbour Bridge & Tunnel - Linkt