The Grand Canyon of the Arkansas River, known as the Royal Gorge, was one of the highlights on the route through the Rockies. The Denver & Rio Grande was then known as the Scenic Line of the World. When surveying parties first examined the route, it seemed impossible to construct a railway through the rugged canyon. The perpendicular granite walls scarcely left room for the river. Blasting away the obstructions, a roadbed was constructed hugging the canyon walls. As the railway progressed, the rugged canyon walls grew higher and higher, the river became a raging torrent to the sea, and areas the sun could not penetrate. At the narrowest point, which is 30 feet wide, a long, iron bridge was suspended from the smooth canyon walls. This became the famed hanging bridge. Passenger trains have stopped at this point for decades to allow passenger to alight and marvel at the sights and sounds of nature and see how man had conquered one of nature's obstacles. The walls of the canyon at this point rise 2,600 feet above the track.