A caver in Valley Entrance, Kingsdale, Yorkshire Dales, Yorkshire, England, United Kingdom, Europe

man cave caver caving pot hole spelunking spelunker underground erosion eroded water tube cavern formation roof constricted space air claustrophobic day people portraits one person one man only men adventure adrenalin cavers potholer potholers potholing pot holers pot holing caves valley entrance kingsdale yorkshire dales yorkshire england great britain united kingdom europe wading head and shoulders waist up indoors horizontal