I was told that if I had only one day in Yosemite, hiking up to Vernal Falls and Nevada Falls was the one I would need to do. This is also the path to the famous Half Dome, and is almost the halfway point if you wanted to get to Half Dome. The hike was pretty strenuous at times, with the entire way up being 95% inclines, including some steep, winding, rock staircases that seem to last forever. Definitely well worth the views though.