I got lost in the giant natural cavenetwork under my house for about a hour, And by time i'd found the enterance i'd gotten:

I really need to make it navigational down there, Even though theres about 300 torches now i just find new walkways into big hallways with more tunnels. And i've not even dug any out at all.
Case in point:

That's the enterance area, And just in that picture there's around 6 pathways, None dead ends.