However, the results of the primary research undertaken revealed a different scenario and that the main environmental problem that DINP was really faced with was rubbish which was agreed by almost all respondents from the questionnaire. Moreover, more than half of the respondents also felt very strongly that it was Thai people creating more negative impacts than foreigners. The findings can be supported by Samovar and Porter (1991) which explained that people, especially from different cultural backgrounds acknowledge things differently because stimuli are chosen from the external environment and interpreted into profound meaningful internal experiences. This notion is supported by Rungapadiachy (1999) who described perception as the interpretation of sensory input. Therefore, it can be concluded that perception is the process that shape and produce what people actually experience and their backgrounds. However, a number of both Western and Asian respondents felt that tourism led to the invasion and destruction of forests because more land is needed to build the necessary superstructure to cater to tourists. None of the impacts from the previous research as mentioned earlier were said by any of the respondents, but if tourism development is adding to negative impacts the national park should really consider not expanding attraction routes and sites as they intend to do.