Difficult Distinctions Travel threshold There are three commonly drawn distinctions that are particularly difficult to apply in the case adventure tourism. The first is that for the purposes of economic and/or activity only qualifies as tourism if it includes an overnight stay travel away from the participant's place of residence. In Australia, the minimum threshold travel is set at 40 km, but this does not necessarily apply worldwide. commercial adventure activities are single-day tours. of their clients, however, are holidaymakers who are already far from home and so km as tourists. In many single-day adverture tours travel 40 from the pick-up point in the nearest gateway town to the location of the day's activity itself. it is reasonable to consider these one-day activities as tours, is indeed how they marketed.