Every spring, the National Park Service and the National Park Foundation of the United States devote a week to protected places in the country. In honor of the next such event, Google added a virtual tour of 31 national parks in the United States to the Earth Planet service .
Now users can walk around such reserves as Acadia , Shenandoah , Joshua Three and admire, albeit remotely, the beauty and sights of these places.
For starters, Google offers to look at the mountains of pink gra...