Wales: Porth yr Ogof
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Wales: Porth yr Ogof - upstream from the Tradesmans'Entrance
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South Wales: Cwmbran Entrance to Porth yr Ogof
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Wookey Hole: Chamber 11
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Wookey Hole: Chamber 15
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Wookey Hole: Deep Route to 20
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Ireland: Co. Clare: Entrance to Hell at Doolin
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Ireland: Co. Clare: The main tunnel in Hell
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Ireland: Co. Clare: The entrance fissure to Hell
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