I found these pictures from one of our road trips on the Forts Trail in Texas. These come from one of the barracks ruins at the Fort, one in Black and White and One in Color. Which one do you like the best? Linking with Good Fences (although this is more like doors in some walls) you might enjoy. It's fun to think about what these walls and doorways have to tell.
These were taken by the camera man hubby with his Nikon, not by my trusty IPhone! Thanks for hosting, Theresa. Hope these aren't too far removed from your theme.