After hearing a rumor about a mysterious train tunnel in the South Island of New Zealand myself and DerelictNZ went out to investigate.
Sadly our first attempt was a bit of a fail after spending a whole afternoon trying to find it but after some more research urbexcentral returned and this time success!
The tunnel was fully bored and constructed in the early 1940’s however it was given up on after some of the walls started breaching. The damage inside the tunnel is pretty substantial and it felt pretty unsafe to lurk through, from the crazy angles and curvature in the tunnel I suspect the kaikoura earthquake in 2016 played a part in the damage.
U R B E X C E N T R A L 
where is this tunnel??
South Island.
Hi, I need to test some instrumentation in a tunnel like this, can you please send me more specific location?
Hi Julian. We’ve actually hunted for this tunnel again, and can’t find it. It’s like a needle in a haystack.
cool:)!
Amazing location!
i’ve been in a few of the old underground powder stores and bomb shelters in the south, pretty sketchy but real fun to look in.
Is this tunnel in otago?