Grand Canyon National Park

Carved by the Colorado River over 5 million years, the Grand Canyon in Arizona plunges 1,857 metres deep and stretches 446 km long, exposing 2 billion years of geological history in its layered rock walls. Established as a national park in 1919, it covers 4,926 sq km and hosts 1,500 plant species, 355 bird species, and 89 mammal species. Over 6 million visitors arrive annually, making it one of the most visited national parks in the United States.