The Geologic Column
Colorado Springs, Colorado
Looking at the Geologic Column, an exposed cliff face showing various strata of colorful rocks, you might say to yourself, "Wow, nature made that so clear and easy to understand!" Except that nature didn't make it; the Geologic Column was built by humans in 1907 as a cliff-face layer cake "calendar" to show other humans just how far back in time Colorado's rocks go.
The Geologic Column was the brainstorm of engineer Edmond van Diest and Colorado College geology professor George Finley, and was designed to appeal to the expertise of local residents, many of whom had come to Colorado Springs as miners. At the bottom is granite, sandstones are the middle, and shale is on the top. It was originally an accessory to the real attraction: a little man-made waterfall in the notch next to it. But the waterfall was turned off in 1956, and now only the Geologic Column remains.