Since 2006. Just 11 miles north of the Atlanta Perimeter, the Castle is 87,000 square feet and comfortably holds 1,100 Noble Guests per performance. In addition to the 200 employees staffing the Castle, there are 23 Andalusian stallions in residence. The Castle, an anchor attraction at Discover Mills, includes a stone facade, Dungeon, Bar and Gift Shop. Guests will enjoy the Castle’s medieval theme throughout the interior.