NABSQNO 15S-755880-4223163
Cow Shank Natural Bridge in Randolph County, Illinois
Photo by Jay Wilbur
NABSQNO 15S-755880-4223163. Cow Shank Natural Bridge is a waterfall natural bridge eroded through sandstone. It is located on public land, but is exactly adjacent to private property. The boundary passes along the lip of the lintel! Access is via a good gravel road that heads north from the small town of Prairie du Rocher. It has a span of 20 feet, a height of 14 feet, a width of opening of 7 feet, a width of 6 feet, and a thickness of only 1 foot.