The factory is every child&rsquos &ndash and adult&rsquos, too, truth be told &ndash dream come true and every dentist&rsquos worst nightmare. Imagine a library and now substitute the books with chocolates and I give you Maison Cailler chocolate factory. I would compare it with a walk through the Vatican museum &ndash you have to pass through galleries and rooms dedicated to artists such as Michelangelo and Raphael, until you hit the mother lode, the Sistine Chapel. Similarly, at the Maison Cailler chocolate factory, though we learn about chocolate history and about the maison heritage, the mother lode is the chocolate tasting.