The Rhine Gorge is a popular name for the Upper Middle Rhine Valley, a 65 km section of the Rhine between Koblenz and Bingen in the states of Rhineland-Palatinate and Hesse in Germany. It was added to the UNESCO list of World Heritage Sites in June 2002 for a unique combination of geological, historical, cultural and industrial reasons.
The region's rocks were laid down in the Devonian period and are known as Rhenish Facies. This is a fossil-bearing sedimentary rock type consisting mainly of slate. The rocks underwent considerable folding during the Carboniferous period. The gorge was carved out during a much more recent uplift to leave the river contained within steep walls 200 m high, the most famous feature being the Loreley.
Wikipedia https://en.wikipedia.org/wiki/Rhine_Gorge
UNESCO website http://whc.unesco.org/en/list/1066
Address 35 Bachstraße, Wellmich 56346, Germany
Coordinates 50°10'24.96" N 7°41'39.012" E