アメリカ内務省さんのインスタグラム写真 - (アメリカ内務省Instagram)「The views at @blackcanyonnps in Colorado are epic. The Black Canyon is incredibly deep and sheer, with plunging cliffs, soaring buttresses and a thundering river that rushes past the narrow walls exposing some of the oldest rocks in North America, dating back nearly two billion years. The Painted Wall (pictured) is the highest cliff in Colorado and one of the most dramatic sights in the park. For comparison, four Washington Monuments stacked on top of each would be roughly the same height as the wall. Photo by Eric Ritchie #NationalParkWeek #YourParkStory Alt Text: A river flows through a narrow canyon during sunset.」4月28日 5時30分