What is Grand Canyon?  Why is it so well known?
What is Grand Canyon?  Why is it so well known?
user
Grand Canyon is a canyon in Arizona, about 2-1/2 miles wide and one mile deep.  It is famous because it is very large and very beautiful, with many beautiful rock formations.
assistant
Is it located on Colorado river?
user
Yes, Grand Canyon is on the Colorado River, a famous river in the west, which runs through the states of Colorado, New Mexico, and Arizona.
assistant
Is it located in Arizona or Nevada?
user