Château de Pont-de-Briques
Fortress · Saint-Léonard
Bridge
viaduc d'Echinghen
The viaduct of Echinghen is a French viaduct located on the A16 motorway in Echinghen near Boulogne-sur-Mer in the Pas-de-Calais department. It is the longest bridge in the department and the 25th longest in France. It is 1301 meters long and its height reaches more than 80 meters. It forms, with the viaducts of Quéhen and Herquelingue, all the "viaducts of Boulonnais".