The Derwent Valley Mills World Heritage Site is located in Derbyshire, England, and is recognized for its significant role in the Industrial Revolution. It encompasses a series of historic cotton mills, including the famous Arkwright's Mill, which showcase early industrial architecture and innovations in textile manufacturing. Designated as a UNESCO World Heritage Site in 2001, the area highlights the development of water-powered mills along the River Derwent. It represents the transition from hand production to mechanized manufacturing, illustrating the technological advancements that shaped modern industry and society.