. "Manchester Hole" . . . "Upper Nidderdale caves" . "Pillar Pot and Rift Pot" . "Nidderdale Caves" . . "Upper Nidderdale" . "Nidderdale Caves" . . . "caves" . . . . . . "Caving" . . "Nidderdale caves" . "underground" . . . . "New Goyden Pot" . "Goyden Pot" . . "Goyden System" .