The Sidi Rached Viaduct is the grandest of Constantine's gorge crossings and one of the most impressive pieces of French colonial infrastructure in North Africa. Built between 1908 and 1912, the viaduct carries the tram (now a light rail line) and pedestrians across the gorge on 27 stone arches at heights up to 107 metres above the river. Looking at it from below — accessible via a path down the gorge slope — the scale is remarkable: slender stone piers rising from the canyon floor to support an arch span that seems impossibly thin from a distance.
The viaduct can be crossed on foot. The view from the midpoint looks east along the gorge and north toward the Sidi M'Cid bridge. The pedestrian walkway is separated from the tram tracks by a barrier. Do not attempt to descend to the gorge floor except on the established path — the rock is unstable.