Eltz Castle is a medieval castle nestled in the hills above the Moselle between Koblenz and Trier, Germany. It is still owned by a branch of House of Eltz who have lived there since the 12th century. Eltz Castle along with Bürresheim Castle and Lissingen Castle are the only castles in the Eifel region which have never been destroyed.

The Moselle is a river that rises in the Vosges mountains and flows through north-eastern France and Luxembourg to western Germany. It is a left bank tributary of the Rhine, which it joins at Koblenz. A small part of Belgium is in its basin as it includes the Sauer and the Our.