Rue des Martyrs from Mondorf-les-Bains

At just 1.7km, Rue des Martyrs from Mondorf-les-Bains is short but deceptively intense — 61m of elevation packed into a brief, breathless effort. The average gradient of 3.7% disguises ramps of 8.8% — the kind of gradient that turns plans into prayers. The 3 hairpin turns break up the climb, each one revealing a new perspective on the road ahead. Located in Grevenmacher, Luxembourg.