Zurick 1992 proposes a spatial hierarchy model specific to adventure tourism. He not notes that in most instances individuals proceed from the generating region through an intervening gateway,located in the semiperiphery, to a national gateway in the periphery destination. Their Flow is further channeled through regional gateways to the actual adventure region, both of which extend into the frontier of the peripheral destination. To be applicable in the present context, Zurick's model would have to take into account the overland movement from the adventure region to further regional, even national gateways, and form there to other adventure regions. this cycle may be repeated several times, depending on the particulars of the overland trip.