06/21/2010 05:12 am ET Updated May 25, 2011

National Park Week (PHOTOS): Celebrating The Beauty Of Our Parks

This week is not only all about Earth Day, but it's also National Park Week. From April 17-25, all national parks across the U.S. are offering free admission, making it a great opportunity to visit these tributes to wilderness. We've teamed up with National Geographic to bring you stunning images of our national parks. Take a look, and vote for your favorite park!

National Parks