Union City, Tenn.–The 2019 “Let it Glow Light Show” at Discovery Park of America is doing just that. The Light Show includes more than one million lights, a nativity scene and surprises around every magical corner. Visitors can drive through the lights seven nights a week. It is only $10 per car to wind through the lights that are synced with your favorite holiday songs. The Let It Glow Light Show will be closed Christmas Eve and Christmas Day. (Discovery Park photo).