According to Climbing in North America by Chris Jones, Josiah Whitney of the California Geological Survey described Yosemite’s Half Dome as “perfectly inaccessible” in the 1870s. Of course, plenty of climbers have since proven him wrong. Dare devils who aim to ascend the 8,839-foot granite dome now have several different options for making their way to the top. The final 400 feet are, for the most part, entirely vertical, which is why this climb is considered risky. According to the National Parks Traveler, as many as five people have died after falling off the Half Dome’s cable-assisted route that leads to the peak.