Boho parish has a high biodiversity of flora and fauna due in part to the niches offered by the limestone karst substrata combined with fen meadow, upland heath and acidic bog. The three mountains found within the parish; namely Glenkeel, Knockmore and Belmore provide a landscape varying from high craggy bluffs, with views of neighbouring counties, to low, flat bogland punctuated by streams and lakes. Below this landscape are two of the three most cave-rich mountains in Northern Ireland, featuring the deepest cave system in Ireland at Reyfad Pot, the deepest daylight shaft in Ireland at Noon's Hole, as well as popular caves for local outdoor adventure centre groups at the Boho Caves and the nearby Pollnagollum Coolarkan.