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| pot-holing (exploration of underground caves Alexander Demidov) | |||
caving (Caving – also traditionally known as spelunking in the United States and Canada and potholing in the United Kingdom and Ireland – is the recreational pastime of exploring wild (generally non-commercial) cave systems. In contrast, speleology is the scientific study of caves and the cave environment  wikipedia.org 'More); spelunking ([spə'lʌŋkɪŋ] wikipedia.org 'More); potholing (['pɔtˌhəulɪŋ] wikipedia.org 'More) | |||