... https://www.youtube.com/watch?v=AxA_93dMyJM

Clingmans Dome - Great Smoky Mountains At 6,643 feet, Clingmans Dome is the highest point in the Great Smoky Mountains National Park. It is the highest point in Tennessee, and the third highest mountain east of the Mississippi. Only Mt. Mitchell (6,684 feet) and Mt. Craig (6,647), both located in Mt. Mitchell State Park in western North Carolina, rise higher. The observation tower on the summit of Clingmans Dome offers spectacular 360° views of the Smokies and beyond for visitors willing to climb the steep half-mile walk to the tower at the top. The balsam woolly adelgid (Adelges piceae) is an insect pest that infests and kills stands of Fraser fir (Abies fraseri) in the spruce-fir zone. This fir occurs naturally only in the southern Appalachians and used to be the dominant tree at the highest elevations. The adelgid was introduced on trees imported from Europe, and the fir has little natural defense against it. By injecting the tree with toxins, the adelgid blocks the path of nutrients through the tree. The trees literally starve to death, and thousands of dead snags are all that are left on the highest mountain peaks. ... https://www.youtube.com/watch?v=mtTSCSbcOIg