Early corrosion on the steel stay cables of the Kurt Schumacher Bridge in Mannheim–Ludwigshafen was in the 1980s the trigger moment for Empa researchers at to initiate a development program with the goal to replace steel cables by carbon fiber-reinforced polymer (CFRP) cables. The project “Strengthening of Steel-Reinforced Concrete Structures with CFRP Laminates” followed immediately. In the 1990s, the first CFRP applications happened in construction. They have carefully been monitored. From a technical point of view, all projects were and still are very successful; however, up to now only CFRP strengthening was also a commercial success. The proposals for the “Arctic City,” an air-supported dome of 1971, a suspended very long-span bridge made of carbon fiber-reinforced polymers from 1987, and a submerged tunnel made of glass fiber-reinforced polymers from 1989, both across the Strait of Gibraltar, have been updated with today’s state of the art and are shown. The environmental impact of carbon fibers and therefore CFRP is discussed for the present time and the future. Finally, the project of a new network arch bridge fully suspended on CFRP hangers is presented.