We had something like this inside of the house. From the cellar to slightly above the floor so the cad door could be installed in a way totally unvisible from o

We had something like this inside of the house. From the cellar to slightly above the floor so the cad door could be installed in a way totally unvisible from outside. The cat could duck under the outer skirt of the house and use the door and then the inside infrastructure to go eat and do private buissness.