The cave is apparently an old copper mine, given the type of stone, that sounds plausible to me. Over in Langford there are a lot of karst formations that do have many natural caves.
The entrance is on the southern slope of Mount Doug and right off of one of the main trails. The opening is small, even if I was not my current corpulent size my claustrophopia would stop me from going in.
It is not a long shaft and it is never very tall. Max could stand up but Ben and Daniel could not.
Here are some pictures:
|Entrance of the cave|
|Even Max had to crawl in - the light behind him is the entrance - it is a four meter narrow crawl|