Explore the Grand Canyon, Yellowstone Park and the Great Smoky Mountains from your computer with Trail View, an ambitious new site from General Mills' Nature Valley brand that takes 'Streetview' technology to the National Parks. The site, developed via McCann New York and production companies Your Majesty and InTheMo, offers 330 miles of immersive national parks content, with 360 degree panoramic views of individual trails as well as interactive park information (such as videos highlighting notable trail markers). You can find out more about how the site was developed via its Tumblr.