Lighthouses, towers, bridges and observatories

Lighthouses, windmills and watermills, water towers, dams, old bridges, observatories and other engineering structures. Many of them were built more than a century ago and still impress with their well-thought-out design, and some have become monuments to the engineering thought of their time. Here it is worth looking at the details: the masonry, the steel trusses, the mechanisms and the traces of how people solved technical problems without modern technology.