Consumed by nature Passage Vaulted roof Horeb Chapel Dr Who filming Dr Who filming Dr Who filming Dr Who filming Cefn Onn Park Cefn Onn Park Cefn Onn Park Cefn Onn Park Cefn Onn Park Cefn Onn Park Air Shaft 4 Snapped right off Air Shaft 3 Remains Quarry DANGER! Ohh.. graffitti on a tree Blubell path Blubell path Broad Guage Rail Overbridge Cwm Lliedi Reservoir Cwm Lliedi Reservoir Trackbed The end of the line Tar Waggons MK2 Preservationists Llanelly and Mynydd Mawr Railway The Walker Horeb Chapel graves The gates Horeb brickworks Cave in Chimney Flu Up the Chimney The Chimney Danger Daylight Firehole A way in