Because in Geological terms, it is an open booock to the history of the natural world that we inhabit.
I don't know who you think "they" are, but humans did not create the Grand Canyon.
yes, they do.
clsdkfe905trifbggh
Because it is a historic landmark in science and it was a beautiful masterpiece.
the grand canyon
a Grand Canyon is nothing but a big erosion.........
Copper Canyon (Spanish: Cañon del Cobre) is such landmark.
It is a Canyon as in the Grand Canyon.
Black canyon
The grand canyon is grand
No, the Grand Canyon is in Arizona.
Le Grand Canyon.