It’s easy to get lost in a mountainous area – distance towards a particular object is often uncertain and you can easily mistake one summit for another.
To solve this problem, somebody made an awesome mountain finder device in Switzerland! Pipes are named after the peaks they are pointing to, and mounted (ha, get it?) on a cylinder. If a hiker peeks (I’m on fire today) through one end, he sees the mountain that he is looking for at the other. Simple!
More info: reddit.com