Slot canyons.
A specialty of the Colorado Plateau.
A hundred feet deep. A few feet wide.
Water created this.
And this.
Photo : Mark in Peek-A-Boo Gulch, Utah
Date Taken : Sun, Apr 7, 2002 1:37:58 PM
Camera : Nikon E885
Shutter Speed : 1/71.6 seconds
Aperture : F2.8
Focal Length : 8.0 mm (1X)
Cropped : to 56% vertical & 61% horiz. of original