The increasing importance of tourism and the growing number of tourists put pressure on tourism destinations. To support competitive and sustainable tourism development, it is advisable to focus on alternative forms of tourism to diversify tourism options in the destinations. From this point of view, it seems appropriate to deal with the issue of ‘Special Interest Tourism’ as a form of ‘alternative’, ‘ethical’, or ‘environmentally responsible’ tourism. The paper reflects the urgent need for sustainable tourism research. The aim of the paper is to explore special interest tourism potential of the Czech Republic based on the mapping of the current spatial distribution of neglected special interest tourism attractions. The findings identify the possibilities for diversification of general (mass) tourism offers. The metadata from Czech and foreign metainformation systems and databases are used.