3. Yosemite National Park, California
Featuring crack climbs and multi-day climbs along bare rock faces, Yosemite National Park in California is one of the most popular areas for rock climbers. One of the most challenging climbs is nicknamed El Capitan. El Capitan was first conquered in 1958 by a team led by Warren Harding after an effort that totaled 47 days over a course of 17 months. Recent climbers have conquered El Capitan in just over four hours.