The Hagen Westphalian Open-Air Museum (German: LWL-Freilichtmuseum Hagen – Westfälisches Landesmuseum für Handwerk und Technik; English: "LWL Open-air Museum Hagen – Westphalian State Museum for Craft and Technics") is a museum at Hagen in the southeastern Ruhr area, North Rhine-Westphalia, Germany.