https://www.theroute-66.com/gascozark.html#gascozark

It is featured about half way down the page.

Location on maps

https://www.google.com.ar/maps/@37.7672815,-92.4043163,3a,50y,18.56h,92.37t/data=!3m6!1e1!3m4!1s-leX2YxQ6gGtqfBwOszt8Q!2e0!7i13312!8i6656