Final answer:
No, the most famous landmark in the southwest region is the Grand Canyon National Park.
Step-by-step explanation:
No, the statement is false. The most famous landmark in the southwest region is the Grand Canyon National Park, which is located in the Colorado Plateau. The Grand Canyon is a massive canyon that was formed by the erosion of the Colorado River over millions of years. It is known for its stunning beauty and attracts millions of visitors each year.