The John Messer Barn is a historic structure within the Great Smoky Mountains National Park in Sevier County, Tennessee, United States. Located along the Porters Creek Trail in the Greenbrier valley, it was constructed in 1875 by Pinkney Whaley. The Whaleys later sold their farm to John H. Messer, who was married to Pinkney's cousin, Lucy.
Location: southeast of Gatlinburg near Greenbrier Cove in GSMNP