Meet Mark Holderman and Robert Hoffman, the passionate caretakers of Kinderdijk’s iconic windmills. Their dedication ensures that these 18th-century engineering marvels remain standing strong. Once revolutionary tools in the Dutch battle against water, these 19 windmills, part of the largest remaining collection, were designed to pump water from the lowlands and protect the land from flooding. Watch Engineering Europe, Sundays at 8pm on National Geographic UK | National Geographic UK

These 18th-century windmills line the canals of Kinderdijk, working when necessary to drain the land. This picturesque UNESCO World Heritage site is beautifully preserved and demonstrates the engineering prowess of the Dutch people, fending off inundation to allow farmers to work the fertile soil. #EuropeFromAbove is now streaming on Disney and Hulu. | National Geographic History