The Roof Cherbourg on Clmb House. Venue in 2 impasse du Chemin de Fer, 50690 Martinvast, France, France. The Roof Cherbourg in Martinvast, 5 to 10 minutes from Cherbourg next to the pump track, is a 1,000 m² climbing house with 650 m² of bouldering in three area...