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St James Station, NSW - Although the underground railway stop is still being used, the rest of the tunnels around St James Station have been coated in darkness for almost a century.

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Hidden gem - Beneath the city, these dark and damp tunnels might be getting a new lease of life with NSW Transport Minister Andrew Constance suggesting it's a hidden gem for potential bars and restaurants.

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Tunnels -

The tunnels were built in the 1920s as a part of an unfinished railway line project. The project was abandoned, as was the tunnel network.

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Occult -

Since then, only those who were interested in the occult dared to brave the ghostly walkways.

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Bridgewater, SA - Located under Bridgewater station along the Bridgewater line, this passenger railway was closed in the 1980s but the tunnels underneath still remain.

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Waterways -

The Heysen Trail at the Old Bridgewater Mill leads to this abandoned waterway that can be explored... if only you dare.

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ANZAC Drain, VIC -

Melbourne's stormwater drains aren't the most appealing places to take a stroll. That is until you discover that it is one of the longest and most complex systems in the world.

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Danger -

ANZAC Drain is the best-known for the secretive Cave Clan. Starting in Melbourne in 1986, this urban exploring crew made this place their meeting place.

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Graffiti -

With the appropriate lighting, footwear and bravery, you can walk this drain and admire the graffiti along the walls.

Explore the dense street culture that has been left behind from those that came before you.

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Old Helensburgh, NSW - Hidden in the lush rainforest that is Helensburgh, this abandoned railway line makes for a beautifully eerie photoshoot.

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A century - Deserted over a hundred years ago, this tunnel has become overgrown and its majestic arch embellished with vegetation.

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Darkness - In the midst of the darkness, glow worms have taken up residence. But this destination is so wild you may pass the tunnel without even noticing.

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Darling Harbour, NSW -

The oldest railway in NSW is the Darling Harbour Railway, built in the 1850s.

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Extended -

Although the tunnel goes unused, it has been extended many times to allow for building above it, along George Street.

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Swan View, WA -

Former railway tunnel, Swan View was the only tunnel on the Western Australian railway network before 1999.

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Trail - Nowadays, this spooky and historic tunnel is used as a part of a nighttime ghost walk.

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WWII Tunnels, NT -

In the 1940s during the war, these tunnels were mainly used for storage but were subject to cracking and peepage.

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Quickly - They were quickly abandoned after the war, but some were resealed with steel and tours are now held in the refurbished tunnels.

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Ernest Junction Tunnel, QLD -

Constructed in 1888, it was once a part of the South Coast railway line.

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Full -

In its heyday, there was gold mining not too far and the area was bustling. Now, the tunnel is full of graffiti and old ghost tales.

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North East Rail Tunnel, TAS -

Hidden behind vegetation, this old rundown tunnel used to be a key part of the North East railway lines.

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Creepy -

Now you can walk down it's creepy, long hallway, taking in the layers of history and grime.

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Yugar Tunnel, QLD -

Comprising of the now-closed Ferny Grove to Dayboro line, this tunnel was abandoned in 1955.

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Bats -

It is referred to as 'the bat cave' by locals because of its population of rare bent-wing bats living within. Be wary upon entering!

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Spray Tunnel, TAS -

The Silver Spray Mine in Zeehan was active in 1887. In 1901 the Argent tramway extended through to the mine. So was born the Spray Tunnel which is now used as a walkway.

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Glenbrook Tunnel, NSW -

Although this tunnel is abandoned and no longer in use, it is heritage-listed. It has been used as a railway line and a deadly mustard gas storage facility.

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Mushroom -

Part of the tunnel is now the location of an active mushroom farm in the Blue Mountains.

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Merri Creek, VIC -

In Northcote, an underground WWII tunnel was found, and although there is much speculation as to where it would've connected to excavation has ceased. Now it just sits and gathers dust.

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Leighton Battery, WA -

This underground artillery in WA was abandoned after WWII, however, is now open for tours.

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