Latter definition by Johnston (1992) and Sung, Morrison and O'Leary (1997) essentially rest on the same premise. In contrast, walled (1997) incorporates cerrtain outdoor activities other than the traditional recreation ones into the the confines of adventure tourism. Nevertheless / conceptualizatinos. Thay all view adventure tourism essentially as an extension of adventure / outdoor activities/ recreation; the introduction of the tourism elements merely serves to transfer the place at which the outdoor recreation/ adventure recreation activity takes place from the participant s home base to the destinations.