Old Mill at Kennywood is a boat ride through an indoor water channel that has run since 1901, first as Ye Olde Mill and later under many themes, including Garfield's Nightmare. Since 2020 it is an Old West ghost town comedy led by Harold, a mischievous skeleton outlaw. Boats pass a saloon, a bank robbery, a jail and a cemetery full of tombstone puns. Silent-movie title cards introduce each scene, and the scares stay mild.