Porth yr Ogof is a solutional cave near the village of Ystradfellte, near the southern boundary of the Brecon Beacons National Park in Wales. It lies on the course of the Afon Mellte, a river whose name translates as 'lightning', commonly explained as a reference to the "flashy" nature of the river, i.e. its rising and falling rapidly in response to rainfall. In 1998 the cave's passageways had been measured as over 2.25 kilometres (1.40 mi) in length. Among the cave's fifteen entrances is the largest cave entrance in Wales and one of the largest in the UK, nearly 20 metres (66 ft) wide and 8 metres (26 ft) high.[1] The cave was used as a show cave many years ago, but is not as attractive as more decorated caves such as Dan yr Ogof, and so today is more often used to introduce people to cave exploration.
^"Brecon-Beacons.com". Archived from the original on 13 November 2013. Retrieved 13 November 2013.
in 1988, and three cavers drowned in the Marble Arch system in 1995. PorthyrOgof, in South Wales, accounts for eleven fatalities, nine of which were...
National Lifeboat Institution (RNLI) lifeboat station, located in PorthyrOgof cove, Trwyn yr Wylfa (Wylfa Head), on the west side of Cemaes Bay, near the...
to heavy rainfall. The entire river runs underground for 1/2 km at PorthyrOgof as it crosses the Carboniferous Limestone outcrop. It resurges at Pwll...
Dan yrOgofOgof Agen Allwedd Ogof Craig a Ffynnon Ogof Draenen Ogof Ffynnon Ddu Ogof Hen Ffynhonnau Ogof Hesp Alyn Ogof Llyn Parc Ogof Nadolig Ogof y Daren...
popular activity. Some of the more famous caves near the village include: PorthyrOgof, with the biggest cave entrance in Wales, into which the River Mellte...
Secrets Of Llangattock Mountain (1997) The Secret World Of PorthyrOgof (1998) Dan yrOgof: The Jewel Of Welsh Caves (1999) Underground Wales (2001) Diving...
between Trwyn Ogof Hen and Rhod Uchaf are formed by sedimentary rocks, the mica-rich Lingula Flags and the sandstones and mudstones of the Ogof Hen Formation...
[better source needed] Paul Esser, a 21-year-old cave diver, drowned in the PorthyrOgof cave in Wales. His body would remain entombed in the cave for 39 years...
country’s longest and deepest cave networks such as Ogof Ffynnon Ddu and the impressive PorthyrOgof into which the Afon Mellte flows. Further south again...
slate roof, which was much altered in the 19th century. Bryn Gwynt and Pen yrOgof, examples of 'Moonlight Cottages'. In the 17th and 18th centuries it was...
Nant Ganol Ogof Ddu Pant Cae Haidd Pant y Panel Pen Benar Penmaen Penmaenuchaf Hall Porth Ceiriad Porth Neigwl ac Ynysoedd Sant Tudwal Porth Dinllaen i...
coast: Penrhyn Twll Trwynmynachdy Trwyn yr Allt Trwyn Bendro Trwynllundain Trwyn-drain-du Trwyn-Siôn-Owen Trwyn Ogof Hen From St David's Head east to the...
Moelfre Isaf (1040 ft) to the south of the town. There are views from Cefn-yr-Ogof (669 ft), Gallt-y-Felin-Wynt (Tower Hill) (587 ft) and Castell Cawr (known...
1917, Hedd Wyn (Ellis Humphrey Evans) was awarded the Chair for his ode "Yr Arwr" ("The Hero"). On 6 September 1917, when the ceremony of Chairing of...
east coast. 1km 0.6miles I r i s h S e a Slipway Henllwyn Carreg yr Honwy Bae Nant Porth Solfach Mynnydd Enlli (168 m, 551 ft) Lighthouse Bardsey Abbey...
tradition – for example, Rhydychen (literally, "oxen ford") for Oxford, and Gwlad-yr-haf ("land of summer") for Somerset. There are some erroneous "translations"...
Anglesey, landing at Rhos Badrig (Patrick's Moor) and finding refuge in Ogof Badrig (Patrick's Cave). This cave, below the churchyard, has a freshwater...
Chamber coflein NPRN: 275604. GAT PRN: 2125. See also Historic Wales Map , Ogof Arian Cave coflein NPRN: 402228. GAT PRN: 2115. See also Historic Wales Map...
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