4 Sights Seen Only in Colorado's National Parks
Colorado's national parks boast more than just mountain views. These four parks actually contain rich ancient history along with unique and breathtaking landscapes.To learn about the rest of the national parks of the United States, read “National Geographic Guide to National Parks of the United States, 8th Edition": http://bit.ly/GNP8_630
Black Canyon of the Gunnison
About two million years ago, the Gunnison River had washed away the softer volcanic breccia and hit dense basement rock. Trapped in a groove of its own making, the river has been carving deeper ever since, especially during the last ice age, when glacier meltwater sliced through, leaving sheer cliffs in its wake.
Mesa Verde is the only national park to preserve not only national wonders, but also the spellbinding heritage of an ancient people – the ancestral Puebloans – who found shelter, food, and spiritual inspiration here.
Great Sand Dunes
Undulating sweeps of sand — the tallest sand dunes in North America — rise from the rolling grasslands of the San Luis Valley and the craggy spires of the Sangre de Cristo range.
Though some rock formations in the park date back some 1.8 billion years, the current Rocky Mountains began to take shape about 75 million years ago.
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