2. The North Edge Grand Canyon National Park is located on the Colorado Plateau in the northwest of Arizona in the western United States. It is 443 kilometers long and is one of the wonders of the world. Because of the strong downward cut of the Colorado River, this canyon is also called the Grand Canyon of Colorado. 1869, American artillery major Powell led an expedition and sailed by boat from the upper reaches of the Colorado River to the bottom of the Grand Canyon. He wrote his travels about the canyon scenery he witnessed and the thrills he experienced, which was widely publicized and attracted the attention of the whole country. Colorado National Reserve was established in 19 1 1. 19 19 The US Congress passed a bill to designate the deepest and most spectacular section of the Grand Canyon as the Grand Canyon National Park, which has been listed as one of the world natural heritages by UNESCO.

The Grand Canyon is generally east-west, starting from the confluence of the Colorado River in the east and reaching the Grandvash Cliff near the Nevada border in the west. The shape is extremely irregular and winding. The width of the top of the canyon is between 6 and 30 kilometers, and it shrinks downward into a V-shape. The river bank is high in the north and low in the south. The maximum valley depth is greater than1500m, and the water surface width at the valley bottom is less than1000m. The narrowest part is only 1.20m, and the unique scenery of the canyon is vast and magnificent, unparalleled in the world. Due to the erosion of river water and the difference in stratum structure and hardness of river valley, long canyons crisscross, some of which are wide and some are narrow; Some places are as sharp as pagodas, and some places are piled up as cornerstones; Some are like towering peaks, others are like caves. Give people mythical names according to their image characteristics, such as Di Anna Temple, Polo Temple and Apollo Temple. Especially in the valley wall strata, the joints are clear and layered, like a curve pattern composed of thousands of poems, undulating along the mountain and extending along the valley. From the bottom of the valley to the top of the mountain, the rock series from Precambrian to Cenozoic are exposed along the cliff, with clear horizontal levels and representative fossils, and are called "living geological history textbooks".

The Grand Canyon National Park is rich in wildlife. More than 90 species of animals and 180 species of birds were found. In the canyon, juniper, dwarf pine and wild flowers are lush, and the plants are cactus, poppy, spruce and fir.