Is There a Hidden Door Behind a Wall in a Basement?

When we bought our new house here in Knoxville, it came with some major basement flooding issues. Thanks to you and to my valued sponsors, I could afford to install a sump pump system. When they knocked out one of the walls, there was a door. We have a coal room under our porch. It is a surprisingly large concrete lined basin. Back in the day, a coal truck driver would have made regular deliveries to the house. And that guy probably would have died of lung disease some years later, like Grandpa Regusia did because coal and cigarettes.