This paper contributes to research on sustainable tourism development by utilizing an empirical approach to clarify visitors' subjective perceptions and assessments of tourism supplies and tourism‐related amenities and infrastructure with respect to environmental performance and protection practices. These aspects are analysed mainly with regard to tourists' self‐reported environmental concerns and their country of residence. Disclosing such tourist perspectives and opinions is not only interesting in its own right but might also act as a supplement and a corrective to local viewpoints. This study of international motor tourists should additionally be regarded as a basis for further monitoring and as a building block for a knowledge‐based platform serving aspirations towards more sustainable tourism and improved environmental performance.