Answer:
How far will a blind dog walk into a forest?
What can be seen but never found that only hides in the unwound?
What lies in a tunnel of darkness. That can only attack when pulled back?
I'm full of holes, yet I'm full of water.
What always runs but never walks, often murmurs, never talks, has a bed but never sleeps, has a mouth but never eats?
It rows quickly with four oars but never comes out from under his own roof. What is it?