you fellas are crazy,
In bendigo there are many old mines, my friends and i know of several but a particular one we visited (my mates where renting together) was within 100 meters of where they lived quite close to the centre of town (with in 5km).
I wont name it as im not sure if you can still get to where we used to go.
Anyways you used to go into a man sized white clay carven for a way, then you would have to crawl along for aways downward on a roughly 60 deg angle in a orange rocky rubble on hand and knees, then come to a bit of an opening where you could walk for a bit say 10 15m, then go through this narrow tunnel for about 5 or 6 meters from memory that you could only as i would describe as "caterpillar" along. This is where i started to become worried.
I remember going into this final bit and getting half way and thinking "no F'n way am i going any further" and i started to panic and "reverse caterpillared" out of that particular tunnel back to the previous caren. Sitting there for a bit, slightly apprehensive about venturing further and were my mates where and what if this and that happened and blah blah and "just get the Heck out of there guys" (censored)
My 2 other friends whom where already down in the other chamber, and gone before me, and had been there previously, described the end of the tunnel to me where it apparently opened up next to a brick wall (yes a brick wall), where you had to stand up vertically in about a 1 ft area which fed out into a cavernous room of about 20 m x 3 m long x 10 m high. Mind you id estimate we were 30 to 40 m underground.
Apparently there was a slime covering the brick wall with trickling water coming down from the roof, and water at the bottom of the cavern in places.
We each had torches but they said they couldn't see where water was coming from of going to.
So we all got back all out of the hole after a bit, and had a few afterwards, and talked about hole, and how hard it would have been in the day and that, but we all agreed how dangerous it was and scary and exciting at the same time.
Since then we have had a massive fire that has gone directly through that area that threatened to burn the whole area down and also did take about 15 houses in the fires, we've and also countless floods since we ventured down that hole, i'd also like to think that the council may have blocked access to the mine as it is quite close to housing and children, whom if where like me used to explore lots of old stuff like that.
Had a few beers again and reminiscing about old times growing up in Bendigo
Cheers