Great Sand Dunes National Park and Preserve, Colorado (12x18 Art Print, Wall Decor Travel Poster) Great Sand Dunes National Park and Preserve, Colorado (12x18 Art Print, Wall Decor Travel Poster) Standard 12x18 print, ready for framing Printed in the USA on heavy stock paper using a high-end digital printing press Perfect for your home, office, or a gift Browse thousands of images available, click Lantern Press, above