What are the geographical features of the United States?

The United States is located in the south of North America, bordering the Atlantic Ocean in the east, the Pacific Ocean in the west, Canada in the north and Mexico and the Gulf of Mexico in the south. The whole territory can be divided into five geographical regions from east to west: the southeast coastal plain is divided into two parts: the Atlantic coastal plain and the Mexican coastal plain. This area is below 200 meters above sea level, and most of it is formed by alluvial rivers, especially the Mississippi River Delta, which is the largest delta in the world with fertile black soil. There are some swamps near the estuary. Located in this geographical area, Florida Peninsula is the largest peninsula in the United States. The Appalachian Mountains are located on the west side of the Atlantic coastal plain, basically parallel to the coast, with a total length of more than 2,300 kilometers and an altitude of 1 1,000 ~11,500 meters. They consist of several parallel mountains. The inland plain is an inverted triangle, starting from the long border between the United States and Canada in the north and reaching the Rio Grande in the Atlantic coastal plain in the south. The western mountains include two mountains in the west, the Rocky Mountains in the east, the Sierra Nevada and the Cascade Mountains in the west. The product of the old folding movement. Mount Whitney in the Sierra Nevada is 44 18 meters above sea level, which is the highest point in the continental United States. Mount Rainier in the Cascade Mountains is 4392 meters above sea level, second only to Mount Whitney. The western mountain plateau is composed of Colorado Plateau, Wyoming Plateau, Columbia Plateau and Grand Canyon, and it is the most complicated area in the western United States. Located in the northwest of Arizona, the Grand Canyon consists of a series of winding canyons and deep valleys. Magnificent momentum and steep rock walls are rare natural landscapes in the world. There are many rivers and lakes in the United States, and the water system is complex. Generally speaking, it can be divided into three major river systems: all the rivers flowing into the Atlantic Ocean east of the Rocky Mountains are called the Atlantic River System, mainly the Mississippi River, the Connecticut River and the Hudson River. Among them, the Mississippi River is 6020 kilometers long, ranking third in the world. Every river that flows into the Pacific Ocean is called the Pacific water system. Mainly the Colorado River, Columbia River, yukon river and so on. The Great Lakes of Central and Eastern North America. Including Lake Superior, Lake Michigan, Lake Huron, Lake Erie and Lake Ontario, with a total area of 245,000 square kilometers, it is the largest freshwater body in the world and is known as the "Mediterranean of North America". Among them, Lake Michigan belongs to the United States, and the other four lakes are owned by the United States and Canada. Lake Superior is the largest freshwater lake in the world, ranking second in the world after the Caspian Sea.