Yosemite Valley, Half Dome, CA
Clearly this valley gets its name due to its rather distinct shape (one side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half). You’re a real trooper if you hike the Half Dome Cable Route, which runs from the valley floor to the tip top of the dome. It gets some 1,000 hikers per day (day!). It’s a real “into the wild” experience.