Kapelmuur Geraardsbergen-Tour of Flanders

http://en.wikipedia.org/wiki/Ronde_van_Vlaanderen

The Muur van Geraardsbergen (English: Wall of Geraardsbergen/Grammont, French: Mur de Grammont) is a 90 m high narrow road with cobblestones located in Geraardsbergen, Belgium. It is also known as Kapelmuur, Muur-Kapelmuur or simply Muur. The climb starts near the river Dender at 18 m and reaches the top of the Oudenberg at 110 m. This climb is famous for being part of the route of Ronde van Vlaanderen professional cycling race.