Did you know there is a giant "CU" on the Boulder Flatirons?

We all love gazing at the Flatirons in Boulder, Colorado. But did you know there is a giant "CU" etched into the Third Flatiron? I say etched because it has been treated with so many chemicals and mechanical devices over the years. That the letters are pretty much etched into the rock. There is even a faint "I" next to the "CU." Spelling "ICU." In this video, we tell the story of how those letters appeared and how to locate the damage.