This year marks a momentous occasion for the National Park Service — it will celebrate its centennial on August 25, 2016. President Woodrow Wilson signed the "Organic Act" on August 25, 1916, creating a tradition to secure, protect and maintain the country's natural wonders and historical sites. Yellowstone was America's first national park and the most recent addition to the 59 federally protected areas is Pinnacles National Park. These sites preserve and highlight the stunning beauty to be found in America and are definitely bucket list material. See iconic Half Dome at Yosemite or witness the remaining remnants of Appalachian culture at Great Smoky Mountains. While each have their own unique draw, the locations in GAYOT's list of Top 10 U.S. National Parks offer rich and varied natural experiences, unparalleled scenery and exciting activities.