“How do you design a new type of elevator without installing it in an existing building? It’s a chicken/egg question that engineers have long struggled with—even using abandoned mine shafts to test new technology.
Today [7/29/15], [ThyssenKrupp] said it had topped out on a 761-foot-tall concrete tower in southwest Germany—the tallest observation tower in the country—that will make that process easier.
Full article and photos are at gizmodo.com