The Rhine River flows from high in the Swiss Alps through five countries and the majestic Lake Constance, to reach a vast delta in the Netherlands. The Neckar River joins the Rhine at Manheim and the stretch between Koblenz on the Rhine and Bad Wimpfen on the Neckar is the focus of this engaging journey by bike and barge. This compact region is home to numerous castles, Roman ruins, quaint medieval towns and a rich wine making tradition as evidenced by the terraced vineyards lining the river banks. With a relaxed pace of cycling, there is ample time to explore the cobblestone wine villages and absorb the fascinating history embedded in such towns as Heidelberg with its historic old town and castle ruin, the Dome of Worms and the Hornberg Fortress en route to Bad Wimpfen.