Valley of Ice
The Great Gorge - Mt. McKinley - Alaska
The "Great Gorge," located on the south side of Mount McKinley, was
found to be nearly 9000 feet deep, making it deeper than the steepest
valleys in the Grand Canyon or Yosemite National Park. The measurement
includes the ice of the Ruth Glacier, which fills the bottom of the
gorge, combined with the height of the vertical walls that surround it.