Stage 16 The most horrific of all this year's stages despite being just 15km long.
History Alpe d'Huez is one of the Tour's most famous stages, where Iban Mayo won last year.
Each hairpin on the mountain highlights a former winner of the stage here. Our animated guide picks out some of the most famous years at selected corners.
Winner Armstrong produced a blistering ride to blitz away his rivals in arguably the Tour's toughest stage.