Adventure tourism gains much of its excitement by allowing its participants to step outside of their comfort zone. This may be from experiencing culture shock or through the performance of acts, that require significant effort and involve some degree of risk (real or perceived) and/or physical danger. This may include activities such as mountaineering, trekking, bungee jumping, mountain biking, rafting, zip-lining and rock climbing. Some obscure forms of adventure travel include disaster tourism and ghetto tourism.[1] Other rising forms of adventure travel include social tourism, jungle tourism and overland travel.
Access to inexpensive consumer technology, with respect to Global Positioning Systems, flashpacking, social networking and photography, have increased the worldwide interest in adventure travel.[2][3] The interest in independent adventure travel has also increased as more specialist travel websites emerge offering previously niche locations and sports.
source:http://en.wikipedia.org/