Museo Histórico Minero D. Felipe de Borbón y Grecia, Madrid

There's lots of interesting things to see in this museum, located in the School of Mining. The building itself is so impressive it was declared a national historical monument. The beautiful library holds 7000 volumes. There's a fascinating collection of instruments and models relating to the science and industry of mining. Visitors also get the chance to go underground in the garden in the Marcelo Jorissen Mine-Museum (a 50 meter deep reproduction of a coal mine). The collection of minerals, fossils and rocks (10,000 in total) includes silver from Guadalajara and metallic sulphur from Germany. The fossil collection contains examples of almost every plant and animal found on the planet today. Collectors come from far and wide to visit the public market selling minerals, fossils and gems in the hallway.