1Half Dome Stairs, California, USA

Rising nearly 5,000 feet above Yosemite Valley and 8,800 feet above sea level,

..Half Dome is a Yosemite icon and a great challenge to many hikers. Today, thousands of people reach the summit. For most, it is an exciting, arduous hike; for a few, it becomes more of an adventure than they wanted.
Indeed, park rangers assist hundreds of people on the Half Dome trail every summer. Most of these emergencies could have been prevented… Click the next ARROW to see the next photo!