Hidden Lake Winery is one of the largest wineries in Southern Illinois and was opened to the public in 2005. It stretches across 92 acres of forest. Hidden Lake Winery is located in Aviston, Illinois, although its address can be entered as any of three towns: Aviston, Germantown, or Trenton. It is one of the largest wineries in the state, both in area and in the number of people visiting.