Quiz: What is the significance of the year 1919 in relation to the March 23, 2025 by Orin Thorne What is the significance of the year 1919 in relation to the Grand Canyon? Discover more about Grand Canyon Tours at our home page. A) The Grand Canyon was designated as a national park. B) The first commercial tour company began offering guided trips. C) The Grand Canyon was declared a UNESCO World Heritage Site. D) The first bridge over the Colorado River was completed. Submit Answer
