With the research we wanted to find out what are the tourism practices that tourists perceive as sustainable at tourist destinations in Slovenia that have the Slovenia Green sustainability certificate. We have selected eight destinations. The main method of work was surveying, followed by the analysis of the results. We analyzed 1444 surveys. We found that only 50% of respondents know about the sustainability certificate for tourist destinations, that the most recognizable sustainable practice in destinations is the possibility of using water for drinking from the tap, and that the biggest drawback in destinations is inadequate public passenger transport. We conclude that destinations should invest in more effective propaganda of the sustainability certificate and make more visible progress, especially in the field of public passenger transport.