Named the greatest natural wonder of the world, the Grand Canyon was formed over millions of years by the swift water of the Colorado River, as well as by constant exposure to the wind and sun.
(the Grand Canyon; was formed; T:over millions of years; by the swift water of the Colorado River, as well as by constant exposure to the wind and sun; T:Named the greatest natural wonder of the world)
the Grand Canyon
was formed
T:over millions of years by the swift water of the Colorado River, as well as by constant exposure to the wind and sun T:Named the greatest natural wonder of the world