At exit 100, on I-29, the rest area and visitor centers have an artistic bas relief sculptured look above the main windows. The photo above is a cellphone capture of the visitor center on the northbound side of the interstate. The southbound side has a different image sculpted into the wall above the window.
The rule for Cellpic Sunday is simple. The image must be captured and edited on a mobile device. Captured on a Samsung S7 cell phone, edited on an iPad.