Grand Canyon National Park is the second most visited national park after smoky mountains national park with around 6 million visitors. The park and the canyon is in the borders of Arizona States and it is close to Nevada and Utah borders. It is maybe the second most visited park However, it is most popular one in the country and all over the world. The Great Canyon can be thought as a very very big hole in the ground with 277 miles long, up to 18 miles wide and over 6000 feet depth. The Great Canyon is not deepest canyon of the world, there are several deeper canyons including Nepal Canyon. However it is absolutely the most popular one in the world with its breathtaking, colorful landscape. The Canyon is formed as a result of constant erosion caused by Colorado River. It is estimated it takes over 4-5 millions of years. The climate of the park can be considered as semi-arid. Actually the park can be divided into two parts North Rim and South Rim. South Rim has more arid weather. Although North rim has sparse forest area, there are also many desert basins in the park.