The Picton Mushroom Tunnel, officially known as the Redbank Range Railway Tunnel, is a disused 19th-century railway tunnel located in Picton, only an hour from the centre of Sydney. Originally built in 1863 as part of the Main South Line, the tunnel stretches approximately 180 meters and features arched brick construction typical of Victorian-era engineering.

Now decommissioned and repurposed, the tunnel earned its nickname due to its former use as a mushroom farm. The interior remains cool, damp, and dark—creating a naturally atmospheric and moody environment ideal for film productions seeking a historic, eerie, or post-apocalyptic setting.

The site is surrounded by bushland and is accessible via a gravel road off The Old Hume Highway. The surrounding area is quiet and relatively secluded, allowing for controlled filming conditions. The tunnel has been a subject of local legend and ghost stories, adding to its haunting charm.

Key Features:
Original 1800s brickwork and stone entrances
Long, curved tunnel with natural darkness and echo
Gritty, weathered textures with moss and moisture inside
Surrounded by native bushland, semi-rural setting
Limited light penetration – ideal for controlled lighting setups
Atmospheric location with historical and paranormal intrigue

Access & Facilities:
Vehicle access via unsealed road
On-site parking for light vehicles
Nearest township: Picton (5 mins) – for accommodation, power, and amenities
Requires council permission for filming
Limited to no power or water on-site – generators recommended

Visual Aesthetic:
Dark, moody, historic, isolated, underground, ghostly, industrial decay.