The Grand Canyon National Park is one of the Seven Natural Wonders of The World and as cliché as it might sound, that one fact should be enough to convince anyone to take a trip to northwestern Arizona.The National Park Service (NPS) grants the Grand Canyon National Park the honor of being the second most popular national park in the United States. Following behind the Great Smoky Mountains in North Carolina and Tennessee, the Grand Canyon is estimated to see approximately 5.9 million tourists a year. In 2021, the NPS reported a total of 4.53 million visitors, and for good reason.