Great Sand Dunes National Park & Preserve - Colorado
Alpine tundra, forests, massive dunes, grasslands, and wetlands are all protected as elements of the Great Sand Dunes natural system.
Photo credit to National Park Service
Mark W. Kaelin has been writing and editing stories about the IT industry, gadgets, finance, accounting, and tech-life for more than 25 years. Most recently, he has been a regular contributor to BreakingModern.com, aNewDomain.net, and TechRepublic.