Vieux Lyon's traboules — the covered passageways linking rue Saint-Jean to the Saône quays — were built by Italian silk merchants in the sixteenth century to transport bolts of fabric without exposing them to rain. Today, fewer than forty remain open to the public, their vaulted ceilings and spiral staircases preserved behind unmarked wooden doors. A Lyon panoramic tour with traboules visit unlocks these Renaissance corridors, many still accessed through residential courtyards where iron wells and carved lintels carry the coats of arms of banking families who financed Francois I's Italian campaigns. The quarter earned UNESCO World Heritage designation in 1998 not for a single monument but for the density of its urban fabric: three parallel streets running two kilometres beneath the Fourvière hill, their footprint unchanged since 1550. Traboules at 27 rue du Bœuf and 54 rue Saint-Jean reveal the galleried courtyard typology that defined Lyonnais domestic architecture, with helical staircases rising four storeys in stone wells barely three metres wide. Architects call them vis à jour — daylit screws — because each tread cantilevers from a central newel, the structure held by its own spiral geometry. During the Resistance, traboules became escape routes; printshops on rue de Gadagne used them to move clandestine newspapers from basement presses to safe houses across three blocks. Today, traboules tours pair the passageways with ascents to the Fourvière esplanade, where the nineteenth-century basilica commands sightlines across the Presqu'île to the Alps. The hill itself is Roman Lugdunum's original forum site, its two ancient theatres still visible on the eastern slope. Morning light favours photography in the courtyards; by midday, the stone absorbs heat and the passages offer cool relief. Tour itineraries typically begin at Place Saint-Jean, thread through five to seven traboules, then climb the montée du Gourguillon — a medieval ramp street — to reach the basilica terrace. The descent follows either the Montée des Chazeaux or the funicular, depending on the route. Visitors walking independently should note that traboule doors lock at dusk; guided walks ensure access and interpret the heraldry and construction details that casual passersby miss.