While the iconic Valley Floor is the crown jewel of Yosemite, there is a much lesser-known region. It is almost like a secret entrance or exclusive section of Yosemite that few know of or have visited, yet it is just as awe-inspiring as its rival the Valley Floor. Hetch Hetchy Reservoir, may sound familiar as it serves as the drinking water for San Francisco, but it is also a huge part of Yosemite National Park. The entrance to Hetch Hetchy is on Evergreen Road located off Highway 120, just before the Big Oak Flat entrance to Yosemite. The geography of the granite walls and waterfalls are similar to that of the Valley floor, but with a striking deep blue reservoir in the middle. With the impressive O'Shaughnessy Dam standing 430-feet-tall, wildflowers blooming, and the roaring Wapama Falls that patrons can pretty much walk through, Hetch Hetchy is a hidden gem with plenty to see and do.