The Clarksville in the Monkees song was the Clarksville in Tennessee. The last train to Clarksville was in 1968, a couple of years after the song was a hit. L&N built this train depot in 1901 but continuous service ceased in 1966. From 1970 to 95, the station remained unused until the Montgomery County Historical Society restored it. An engine (seen) and caboose are outside. A small indoor museum is open on Tue, Thur and Sat from 9am to 1pm, as well as a Farmer's Market. And the song's writer's really didn't have this depot in mind when they wrote it, opting for a generic city title, but we can pretend, can't we?