The Brothers Of The Mountains
You're an explorer and there's a lengthy road ahead of you, massive mountains dawn themselves onto the road. You come across a fork in the road and there's a brother standing left and right, at each path. One of them leads to lengthy, tormenting torture and death. One of them leads to the other side of the mountains.
There is a post between them that says...
One of us ALWAYS tells lies.
One of us ALWAYS tells the truth.
One question is all you have.
Getting past the perilous roads and to the safer side, what do you ask the brothers?