Great Sand Dunes National Monument and Sangre de Cristo Mountains, 700 ft dunes are the tallest in North America, Colorado, USA, North America

Plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America

Winding mountain road in plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America

Bend in Colorado River near Lee's Ferry, Glen Canyon Recreation Area, Vermilion Cliffs National Monument in background, Arizona, United States of America, North America

Bend in Colorado River near Lee's Ferry, Glen Canyon Recreation Area, Vermilion Cliffs National Monument in background, Arizona, United States of America, North America

Plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America

Plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River and part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America

Plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America

Plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America

Fossilised bones including hind leg of Sauropod and Apatosaurus, Dinosaur National Monument, Colorado and Utah, United States of America, North America

Hovenweep National Monument, Colorado, United States of America, North America

Hovenweep National Monument, Colorado, United States of America, North America

Street sign at Dinosaur in the far north west. Previously called Artesia, it was renamed in 1965 to capitalize on it's proximity to Dinosaur National Monument, North West, Colorado, USA

Sign for the town of Dinosaur in the far north west. Previously called Artesia, it was renamed in 1965 to capitalize on it's proximity to Dinosaur National Monument, North West, Colorado, USA

Blue sky over desert

High angle view of a valley, Grand Valley, Book Cliffs, Colorado National Monument, Colorado, USA

Road to Monument Valley, Navajo Nation Reservation, Colorado Plateau, Arizona, USA

Toadstool Hoodoo at sunset Grand Staircase Escalante National Monument Utah USA

Prehistoric Fremont rock art (petroglyphs) in Dinosaur National Monument in Utah and Colorado

Great Sand Dunes National Monument in the San Luis Valley, Colorado. The highest sand dunes in North America are found here.

Prehistoric Fremont rock art (petroglyphs) in Dinosaur National Monument in Utah and Colorado

Group Of Rafters On Yampa And Green Rivers Through Dinosaur National Monument

Two Men Rafting In Yampa And Green Rivers Through Dinosaur National Monument

USA, Colorado, Long House pueblo ruin under cliff in Mesa Verde National Park

USA, Utah and Colorado, Dinosaur National Monument, Petroglyphs, USA, Utah and Colorado

USA, Utah and Colorado, Dinosaur National Monument, Petroglyphs, USA, Utah and Colorado