Today the National Parks System celebrates 100 years of overseeing our cherished American parks.  Originally established on August 25, 1916, the NPS has served as the steward of environmental conservation, wildlife protection, and personal enjoyment of our parks. With several of our favorite parks right in our backyard in California – Yosemite, Joshua and Death Valley – we felt it only fitting to share some of these classic posters highlighting our favorite parks to celebrate the centennial.