German Gemstone Museum, Idar-Oberstein
All that glitters is not gold, you may say. Especially once you step into Idar-Oberstein’s main attraction: a museum entirely dedicated to gemstones. All three floors of the villa are packed with crystals, diamonds and virtually every type of gemstone you can find on this planet, surmounting to a whopping 10,000 individual items on display. The vaulted cellar rooms are reserved for special exhibitions revolving around the precious crystal clusters.