Huntsville residents know that Walls refers to the "Walls Unit" which is the central prison unit of the Texas Department of Criminal Justice located in downtown Huntsville. Opened in 1849, it is the oldest prison in Texas. The unit's nickname comes from the surrounding massive red brick walls. But soon, Texas will know Walls as the place for moist, flavorful, pecan-smoked meats and scratch-made sides. This will be the Walls you won't want to leave!