The Grand Canyon is in northern Arizona.
Copper Canyon (Spanish: Cañon del Cobre) is such landmark.
That would be Arizona.
Deep and long and big and a huge gorge in Arizona.
It is in northwestern Arizona.
It is an inspiring experience even if you can't visit the Canyon floor or see a sunrise or a sunset.
The Grand Canyon, located in Arizona, is one of largest natural wonders in America. It would take approximately 2500 cubic miles of dirt to fill the canyon up.
That would most likely be the Grand Canyon.
When the federal government first proposed designating the Grand Canyon for protection from those who would destroy its beauty, the people of Arizona were appalled at the idea of such government interference. Fortunately, the US government fulfilled its responsibility and gave Arizona a natural wonder that no business person could destroy for profit. Arizonans are now so proud of the Canyon that federal officials alone were able to protect, that they have chosen to identify their state with this unique piece of unsurpassed natural beauty. Fortunately for the present day citizens of Arizona, the earlier citizens of that state were ignored.
No it does not its a canyon how would it close!!?
In Colorado you could consider the Grand Canyon or the Black Canyon of the Gannon.
The Grand Canyon National Park is located in the northwestern corner of the state of Arizona in Coconino County, in the United States of America.