Don Felipe de Borbón y Grecia Historic Mining Museum

The Museo Histórico-Minero Don Felipe de Borbón y Grecia is a small and curious museum hidden within Madrid’s Mining Engineering School (Escuela Superior de Ingenieros de Minas de Madrid). Since the museum is located within a college, it’s free and open to the public during regular hours but honestly the best time to visit it is during the monthly gemstones and fossils market which takes place in the courtyard of the school. It’s probably not something you should go out of your way to visit on your own, but making a combined visit to the gemstones market and Museo Geominero located right next door isn’t a bad plan for a Sunday morning.