River crossings

Brief

Crossing water has been a human imperative since we first evolved, and we’ve gone from simply finding shallow water, or a fallen tree, to creating some of the most impressive engineering projects on the planet. The Duge Bridge in China, for example, crosses the Beipan River at a height of 565 metres! All the many stepping stones in the evolution of human river crossings are welcomed in this contest. And if a structure happens to cross water that is more sea than river, that is fine, as it’s in the spirit of the contest.