National Geographic : 1951 Jul
© National Geographic Society 28 s.ouacnrome ny Nailer Meayers L.uwarus Creamy Limestone Cliffs Capped with Green Overhang a French Grand Canyon Here the Detroits (Straits) squeeze the Tarn. The name suggests the narrows from which Michigan's Detroit took its name. The author's party drifts lazily down the gorge. Boatmen must pole back against the current.