This very deep and narrow slot canyon is in southern Utah. Don't come in here if you're prone to claustrophobia! For some folks, this is worse than a cave, because you can see the open sky. But you just can't go that way! It should be obvious where the term 'slot canyon' comes from. At least you won't get lost here, as you can only go two ways. Upstream or downstream (unless you have very strong fingernails...). Have fun!