Zee I lived in Burleson most all my life my folks still live there and I have tried talking them into a storm shelter or the very least a generator for when the power goes out they don't lose everything...but all I got was blue in the face....of course OK is in zone ...but here we stay with our nose in the air :).......I have never thought of or seen anyone fancy up a shelter ...You have done a great job very attractive and interesting now...way to go

Your growing vegetables over it makes me think of the WWII Andersen Shelters in the UK. They had to be partially buried anyway, and food was rationed, so vegetables went over them. Yours is likely to be prettier than most, though! Paint could be good on the exposed concrete, if you're ready to keep repainting it. Hopefully only the outside of it will ever need to be of interest!