masterpiece. Secrets of the castle alchemists. The message in the hidden palindrome on Charles Bridge. Kabbalistic mysteries of the Jewish ghetto. A thief 's shrivelled forearm hanging in a church. A statue revealing its intestines. The largest wind tunnel in the Czech Republic. A fragment of the Great Pyramid of Cheops in a pet cemetery. A clock that runs backwards. A house/museum painted blue to meet the needs of the partially blind musician owner. Unmissable for lovers of architecture, from Baroque to Art Nouveau via Cubism, and the European capital of alchemy and esotericism in the 17th century, Prague offers a myriad of little-known marvels. An indispensable guide for those who thought they knew Prague well, or who would like to discover the hidden face of the city.