There is an old saying that says that you can't go home again. It seems that ultrarunner Paddy O'Leary didn't get that message however, as you'll see in this video. O'Leary wasn't a runner when he grew up in Ireland, but he discovered his passion for the sport while living in San Francisco. Now, he's returned home to explore some familiar landscapes for the first time as a long-distance runner as he looks to set the fastest known time on a tough trail. What he discovers is that a place that he thought he knew well looks a quite different when viewed through the lens of a trail runner. A beautiful revelation indeed.