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Increasing availability of big data, which documents human activity in space and time, offers new solutions to well-known operational problems. Recent studies have demonstrated how topological community detection in large-scale networks of human interactions and mobility can produce geographically cohesive regions, which are meaningful for the regional division of countries. So far, those networks have mainly been built based on the country-wide datasets of telephone calls, typically available for residents of a country. However, it is natural to expect that foreign visitors explore a country in a different way, with patterns that vary depending on nationality. Understanding those differences can be of a great importance for the touristic industry and transportation planning. In this study, we demonstrate the potential of a new type of extensive data, namely bank card transactions executed in a variety of businesses by …