I've seen a few of the rocks in the 99 counties in Iowa.
https://www.instagram.com/explore/locat ... edom-rock/
https://www.thefreedomrock.com/
The Freedom Rock (established in 1999) is a large (approx. 60+ ton) boulder located in rural Iowa that is repainted every year with a different Thank You for our nations Veterans to honor their service to our country. The artist, Ray "Bubba" Sorensen II, was inspired by the movie Saving Private Ryan, as well as, wanting to give Veterans a unique recognition on Memorial Day.
Sorensen paints The Freedom Rock on his own with the tremendous support of family and friends. Sorensen is not commissioned to paint the rock but is able to do so each year with the generous help of donations and merchandise sales.