Holleweg

The Holleweg is one of the roughest stretches of cobbles in the country covered by the Tour of Flanders. The road takes you along the crest of a hill across cobblestones which are large, come in a variety of patterns and get pretty rough, especially on the margins. The road is notionally an N road (one of Belgium's National Routes) in reality, it is an old 18th century stone path in the process of slowly disintegrating.