Rejected Leonardo da Vinci design will finally come to life as world’s longest ice bridge

In 1502, at the request of the Turkish sultan, Leonardo da Vinci came up with the design for a stone bridge that would cross the Golden Horn [...]. With a span of some 240 meters, it would have been the longest bridge in the world—if it had been built. Now, more than 500 years after the sultan rejected da Vinci’s design, a team of students and volunteers in the Finnish town of Juuka are in the process of constructing a scale model of the original drawing—out of ice. — history.com