Great Smoky Mountains National Park lures visitors with its rumpled, mist-cloaked mountains, its leaping streams, dense forests, and Appalachian history. The thrill of hearing a bull elk's bugle echoing off the mountainsides also is becoming a powerful lure, thanks to an elk recovery program that's developed a healthy herd of the iconic ungulates in the Cataloochee Valley and Oconaluftee areas.