Colorado

Nestled in southern Colorado, this park features North America's tallest dunes, which rise over 750 feet high against the rugged Sangre de Cristo Mountains.

Beneath a grassy mountain valley in central Colorado lies one of the richest and most diverse fossil deposits in the world, including petrified Sequoia trees.

Dinosaurs abound at Dinosaur National Monument, where eleven species fossils are found, including Stegosaurus, Allosaurus, and Diplodocus.

Curecanti contains Blue Mesa Reservoir, Colorado's largest body of water, and contains recently discovered dinosaur fossils to boot.

Sheer-walled canyons, towering monoliths, colorful formations, desert bighorn sheep, and soaring eagles are all found at Colorado National Monument.

Visitors to the Black Canyon experience highly technical rock climbing, as well as adventurous backwoods hiking for expert outdoor enthusiasts.

History lovers will find plenty to explore at Bent's Old Fort National Historic Site, one of the first, and for a time only, major settlements in the west.