East Tennessee & Western North Carolina Railroad Locomotive No. 12, also known as Tweetsie Locomotive #12, is a historic locomotive located near Blowing Rock, Watauga County, North Carolina. It was built in 1917 by the Baldwin Locomotive Works for the East Tennessee and Western North Carolina Railroad. It is a narrow-gauge steam locomotive of the ten-wheeled 4-6-0 type. The East Tennessee and Western North Carolina Railroad ceased operations in 1950, and Locomotive #12 is the only one of the railroad's narrow gauge engines still in existence. The locomotive is located at the Tweetsie Railroad theme park.