The five levels of about 260 abandoned caves in Almeria Province, Southeast Spain, about 240 miles from Madrid, were inhabited during the silver rush. The caves were created between 1900 and 1300 BC and were first home to prehistoric dwellers. Many of the caves have been destroyed by erosion but some have been made into homes and tourist lodgings. The nearby Cuevas del Almanzora even has a luxurious golf resort. Cuevas el Guindas are three self-catering caves with kitchens, rocky bathrooms and a pool terrace. The rate is about $55 per night per person, or $75 for two people.