Hiking to the summit of a mountain can take considerable time and effort, so if you're going to do it you'd better pick a good one. And here to help is a nifty visualization of California mountains with the absolute best views at the top. Made by Kai Xu of San Mateo, the viz shows the 21 “on top of the world” mountains in the state – those that when you stand athwart the peak, there's nothing on the earth that rises above the horizon.