In contrast with the stereotypical image of one-way flows going from a few source countries to many host countries, simultaneous exports and imports between two countries appears a plausible phenomenon in tourism. The purpose of this paper is to contribute to our understanding of the empirics of trade in tourism services by studying bilateral intra-tourism trade for a sample of 14 member states of the European Union and by using the most up-to-date and robust method available in the literature to distinguish vertically and horizontally differentiated tourism services: the Azhar and Elliott method (2006). Our results clearly show that a large proportion of European countries simultaneously export and import comparable amounts of tourism services. Moreover, the large predominance of vertical differentiation in these intra-tourism flows suggests that international specialization is taking place in Europe within the tourism sector itself, along the spectrum of quality.