If you"re celebrating Nature Photography Day today, then Great Smoky Mountains National Park would be an excellent place to snap your own shots of sylvan splendor like this one. That"s because you"d have two reasons to celebrate—the park turns 88 today. These misty peaks and valleys along the border between Tennessee and North Carolina were established as a national park on this day in 1934. All these years later, it may not be the most famous national park in the US, but it is by far the most popular. With more than 14 million visitors per year, it draws more people than the Grand Canyon, Yellowstone, and Yosemite combined.