El Capitan @ Yosemite National Park: Famous for its beautiful meadows, epic waterfalls, and overweight squirrels, Yosemite National Park has become a landmark of nature not just for California, but to the whole world (you will find people from EVERYWHERE visiting this park). The always looming granite mountains of this valley will always remind you that you truly are in one of the world's truly unique natural wonders. I can only really speak for my time in Yosemite Valley and not the other other parts of the National Park. Unlike many national parks, Yosemite provides a wide range of facilities and activities for people of all ages to enjoy. For the more daring, there's the Half Dome hike and Yosemite Falls hike, which I hear is as challenging as Half Dome. There are also many much easier hikes to enjoy...and so many extremely idyllic looking meadows to walk through. If you want to raft, you can bring your raft, or rent one for the day. If you want to bike, you can rent one too although I recommend you bring your own bike (the rented ones are pretty crappy). In addition, Yosemite has an good variety of facilities and a variety of living options from ordinary campgrounds tent cabins to the fancy Ahwahnee Hotel. Yosemite Village and Curry Village are not just good information hubs but good places to shop and stock up on supplies - in addition the free shuttle (hybrid buses) service can be convenient for those who may find it too tiring to traverse up and down the valley. In many ways, this area of the Park is basically a tiny, functional city.