Why only one Grand Canyon

The Flood evidences are everywhere. The continental plates, the ocean floor ridges, the fossils, the frozen mammoths/giants, the Canyons, earthquakes, the prizm/rainbow, historic records of the different cultures and civilizations, the Pyramids/Sphinx showing water corrosion, bone and fossil findings in areas of the world where the animal did not or could not have existed and habitated,...etc...everything you see around us shows the fingerprints of the Great Flood...just open your eyes and mind for that matter.

Yes. But the topic of the Grand Canyon is being used as speaking of evidence of the flood. So this is exactly the topic I'm on.