Deep Delve: Whats beneath the Mountain?

The Mountain has looked over your little village of dirt kicking goat herders for longer than you could imagine. And it would continue to do so, except this afternoon a young shepherd has returned from the Mountain with tales of a cave...

1- A chimney has opened in the rockface and the fissure drops down into the dark some hundred feet. It leads to somewhere. The burning torch you drop descends down the hole and lands at the bottom, burning for a while longer before it goes dark.