Wellness tourism as a significant segment of health tourism is becoming increasingly recognizable in the tourist market as an important part of the tourist offer of the destination. The fact that according to the Global Wellness Institute, a non-profit organization from the USA, the world wellness market grew twice as fast from 2015 to 2017 as the entire tourism sector can serve as an illustration. The paper investigates the impact of wellness tourism as a part of health tourism on the development of a tourist destination. In the Republic of Croatia, increasing importance is attached to the development of this form of tourism, which proves that there are about 200 registered wellness centers that operate independently or as part of the offer of hotels and / or health care institutions. One of them is the wellness center in Daruvar Spa, which is the subject of research in this paper. The goals of the research are to research wellness tourism from a theoretical and practical aspect, and to present the results of the research within this specialist graduate professional thesis. The theoretical aspect of the research refers to the analysis of available literary material and knowledge related to wellness tourism from other available sources. The practical aspect of the paper refers to the implementation of primary research, which aims to investigate the satisfaction of users of wellness services in Daruvar Spa. The results of the research show that wellness tourism is an important segment of tourism in Croatian destinations and that users of wellness services show a high degree of satisfaction with the service offered.