Dylan Thuras is a guest blogger on Boing Boing. Dylan is a travel blogger and the co-founder of the Atlas Obscura: A Compendium of the World's Wonders, Curiosities, and Esoterica, with Joshua Foer.
When conquistadors arrived from Spain they were shocked. Spanning vast canyons, and longer than any existing European or Roman bridge was a type of bridge which they had never seen before: an Incan suspension bridge. Today only one example remains.
Made of woven grass, the bridge spans 118 feet, and hangs 220 feet above the canyon's rushing river. The Incan women braid small thin ropes which are then braided again by the men into large support cables, much like a modern steel suspension bridge. Handwoven bridges lasted as long as 500 years and were held in very high regard by the Inca. The punishment for tampering with one was death.
Over time, however, the bridges decayed, or were removed, leaving this single testament to Incan bridge engineering. This previously sagging bridge is now repaired each year, and christened with a traditional Incan ceremonial bridge blessing. The bridge is in extremely good condition and is a perfect location for all of us wishing to indulge in long harbored Indiana Jones fantasies.
Though the Spanish tried many times to build stone arch bridges all were failures until steel and iron bridges were introduced to the mountainous Peruvian countryside. Today the rope suspension bridges are being studied, and even recreated by MIT students. The students made a 60-foot-long version of the Incan bridge which was stretched between two campus buildings.
More on the Atlas here, more on the story of the bridge here, and about the MIT recreation of the bridge here and slideshow here.
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