The Chocolate Museum occupies a purpose-built building on a peninsula jutting into the Rhine, about a kilometre south of the cathedral. It is one of the most visited museums in Germany and traces the history of chocolate from the Mesoamerican Maya through to modern industrial production. The exhibits are genuinely interesting if you have any curiosity about food history — the colonial trade routes, the development of the conching process, the role of European industrialisation in making chocolate a mass product.
The centrepiece, and the reason many visitors come, is the 3-metre chocolate fountain in which a continuous cascade of liquid Lindt chocolate flows. Visitors receive a freshly dipped wafer as part of the tour. It is shameless and enjoyable in equal measure. The museum shop sells an extensive range of chocolate products; the Rhine-side terrace is a pleasant place to have a coffee.