If you travel northeast from Knoxville, through Maynardville and into the rolling pastureland of Union County, you may just stumble upon something that takes you back to another time. It's the Helm's ferry boat and it's one of the last working car ferries in Tennessee. The Union County Road Department has operated the ferry for more than 20 years at no cost to its riders. WUOT's Matt Shafer Powell recently spent some time on the ferry with one of its captains...