Ulmon's recipe for a travel guide is to fuse multiple open sources of data that you may otherwise use individually to plan your vacation, and present them as a coherent package. We are trying to fuse this data in such a way that the resulting whole is more valuable than the sum of its parts. Our main sources of map data and knowledge about places are OpenStreetMap and Wikipedia respectively. This talk is about the challenges posed by connecting these two, and our strategies of coping with them.