Tourism is an important economic activity in our country as it is all around the world. It is also defined as an industry which is related to other economical sectors. Therefore, governments need to manage, develop and market the tourism facilities so that tourism industry can help economical growth effectively. Tourism planning means to manage large amount of data. Therefore, it is desirable to integrate Geographic Information Systems and also Remote Sensing to planning. The aim of the thesis is to define how to increase the contributions of GIS for site selection purposes for new tourism types. The case study is chosen as Bodrum Peninsula that is the hearth of Turkey in tourism sector. The fast and unplanned tourism development is causing some problems in nature, transportation, social and technical infrastructure of Bodrum. Summer houses, hotels, holiday villages are built up increasingly, so a huge difference occurs between winter (97.000) and summer (1.500.000) populations, which produce one of the reasons for problems. In this study, new tourism types, which are camping, caravanning, grass-skiing, site-parachuting and biking activities, are suggested in Bodrum Peninsula. Site selection process for these types is performed according to the requirements defined by the Youth and Sport Association. Slope, aspect, and proximity analyses are performed in order to find the suitable areas for each tourism type. Then, analytical hierarchy process technique is used to give weight to each criterion to emphasize their effects. Finally, site selection results are compared with the environmental plan.