提起大峡谷，人们首先会想到美国的科罗拉多大峡谷。百余年来，它都以“世界第一大峡谷”的称号享誉全球。近几年来，一些国家逐渐领悟世界之最地理景观的社会与经济价值，相继推出了所在国的大峡谷，并向科罗拉多大峡谷发出了挑战。但当今世界上惟一可以直接向科罗拉多大峡谷 When you bring up the Grand Canyon, people first think of the Colorado Grand Canyon in the United States. For more than a hundred years, it has enjoyed a worldwide reputation as the “world’s first Grand Canyon.” In recent years, some countries have gradually realized the social and economic value of the world’s most geographical landscape. They have successively launched the Grand Canyon of their home country and challenged the Grand Canyon of Colorado. But in today’s world the only direct route to the Grand Canyon of Colorado