Red Mountain, BC takes 'smoke shack' to the next level.
With gold mining running deep in the history of the area there are old mine shafts scattered all around. One in particular is quite nice and well recreated for safety meetings. Still have yet to go there with a flash light and actually find the back of the thing - I always get scared with just my lighter thinking I'll trip on a bear or something of the sort. Also with the mining, there is some old mining buildings at the top of the park that are fun to explore, jib, have bbq's at and of course, safety meetings.
Besides the mine shafts, the skiing history goes way back in the area as well so there are a number (4+) of legit cabins scattered in bounds at Red where people (young and old) hang out, apres ski, stay the night, etc....
Poochies Cabin at the top of the Red Chair