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Over the last six million years, the headstrong waters of the Colorado River have carved out the jagged corners of the Grand Canyon, revealing some of the most ancient exposed rocks on the planet. The result is one of the greatest wonders your eyes will behold. Celebrate the 100th anniversary of Grand Canyon National Park in 2019 as you discover the myriad mysteries hidden in the shadows of the park’s massive gorges and ravines. With expert instructors explore, photograph and learn about the fascinating geological history of this world wonder on foot, by raft, by rail or by helicopter.