Ogof Ffynnon Ddu, also known informally as OFD, is a cave under a hillside in the area surrounding Penwyllt in the Upper Swansea Valley in South Wales. It is the second longest cave in Wales and the deepest in the United Kingdom.
Dan yr Ogof, located at the National Showcaves Centre for Wales, is a 17-kilometre (11 mi) long cave system in south Wales, about 5 miles (8 km) north of Ystradgynlais and 15 miles (24 km) southwest of Brecon, in the Brecon Beacons National Park. It is the main feature of a show cave complex, which is claimed to be the largest in the UK and is a tourist attraction in Wales. The first section of the cave system is open to the public, but the extensive cave system beyond is scheduled as a national nature reserve and is open only to bona fide cavers.
Ogof Hesp Alyn was discovered by North Wales Caving Club in 1973 in the Alyn Gorge near Cilcain, Flintshire, Wales. Reaching the end of the cave is a serious commitment involving 24 pitches and the draining of two sumps. The proliferation of short, awkward and muddy pitches appear best suited to be tackled by wire ladders, but in the 1980s a team of divers from the Wessex Caving Club who passed the sumps, concluded that single rope technique was preferable, avoiding the need for excessive numbers of people to carry the equipment. A perpetual siphon has since been used at the first sump which does a good job of keeping the water level relatively low, when working properly.
The River Cynon in South Wales is a main tributary of the Taff. Its source is the rising of Llygad Cynon at 219m above sea level at Penderyn, Rhondda Cynon Taf and flows roughly southeast, into the Taff at Abercynon in the same district. The water emerging at Llygad Cynon has been traced back to the sink of the Nant Cadlan at Ogof Fawr.
Porth yr Ogof is a cave located 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. 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 standing at nearly 20 metres (66 ft) wide and 8 metres (26 ft) high. 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.
GB Cave is a cave between Charterhouse and Shipham in the limestone of the Mendip Hills, in Somerset, England.
The Alyn Gorge is a gorge section of the River Alyn north between Loggerheads and Rhydymwyn in Wales. The west side of the valley rises gently to Moel Famau, while the east bank is along parts a cliff with evidence of tram lines and old quarry workings.
Ogof Agen Allwedd or Agen Allwedd, is, at 32.5 kilometres (20.2 mi), one of the longest cave systems in Wales, and the longest cave system on the Llangattock escarpment.
Ogof y Daren Cilau is one of several cave systems in the Llangattock escarpment near Crickhowell in south Powys, Wales. The cave was discovered in 1957 and is one of the longest cave systems in the country.
Pwll Dwfn is a cave in South Wales. It is located above Dan yr Ogof and cavers can access it from the show cave's car park. The entrance is not gated.
Recreational caving in the United Kingdom dates back to the mid-19th century. The four major caving areas of the United Kingdom are North Yorkshire, South Wales, Derbyshire, and the Mendips. Minor areas include Devon, North Wales, and the Scottish Highlands.
Parc Cwm long cairn, also known as Parc le Breos burial chamber, is a partly restored Neolithic chambered tomb, identified in 1937 as a Severn-Cotswold type of chambered long barrow. The cromlech, a megalithic burial chamber, was built around 5850 years before present (BP), during the early Neolithic. It is about seven 1⁄2 miles (12 km) west south–west of Swansea, Wales, in what is now known as Coed y Parc Cwm at Parc le Breos, on the Gower Peninsula.
Mynydd Llangynidr is a mountain in the Brecon Beacons National Park largely in the county of Powys, south Wales. Its southern slopes extend into the northernmost parts of the county borough of Blaenau Gwent. It is named from the village of Llangynidr which sits in the valley of the River Usk to the north of it. It is essentially an undulating plateau rising in the west to a height of 557m at Garn Fawr at OS grid ref SO 123151. A secondary high point is achieved at a point marked by a trig point at SO 147159. To the north the hill overlooks the valleys of Dyffryn Crawnon and Cwm Claisfer, themselves tributary valleys of the Usk. The shallow upper valley of the Ebbw River reaches into the plateau in the southeast whilst the upper reaches of the Sirhowy Valley and its tributary the Nant Trefil define its western margins. A further tributary, the Nant Milgatw, reaches in from the south whilst the sharp edge of Rassau Industrial Estate also defines a part of its southern margin. Passing east across the B4560, the hill merges with Mynydd Llangatwg which has a similar character.
Esclusham Mountain is an area in Wrexham County Borough, Wales, United Kingdom, and is part of the Ruabon Moors. It rises to a height of 460 m, with the nearby spur of Cyrn-y-Brain, to the west, reaching 473 m. It lies mostly within the community of Esclusham. A smaller spur to the north, known as Minera Mountain, is within the neighbouring community of Minera.
Cathole Cave, Cat Hole Cave or Cathole Rock Cave, is a cave near Parc Cwm long cairn at Parc le Breos, on the Gower Peninsula, Wales. It is a steep limestone outcrop, about 200 yards (180 m) north of the cromlech along the Parc le Breos Cwm valley and near the top of the gorge, about 50 feet (15 m) from the valley floor. The cave is a deep triangular fissure penetrating the hillside and narrowing towards the top. It has two entrances, with a natural platform outside the larger of the two. It is about seven 1⁄2 miles (12 km) west south–west of Swansea, Wales, in what is now known as Coed y Parc Cwm at Parc le Breos, on the Gower Peninsula.
Rhino Rift is a cave near Charterhouse, in the Carboniferous Limestone of the Mendip Hills, in Somerset, England. The cave is part of the Cheddar Complex SSSI.
Ogof Llyn Parc usually known as Pool Park is a cave on Esclusham Mountain above Wrexham, Wales, that has a 100 metres (330 ft) entrance shaft, normally descended by winch to the mine levels. Further caving and two ladders reaches the natural cave levels in which there are streamways.
Ogof Dydd Byraf is a cave which extends under Esclusham Mountain in north-east Wales from its entrance in the south face of the Minera Limeworks quarry. It was originally discovered and explored in 1964 by the Wrexham Caving Club, before they were merged into the North Wales Caving Club.
Chartist Cave is a culturally significant cave on Mynydd Llangynidr in southern Powys, Wales. The entrance is a broad arch formed of Twrch Sandstone which overlies the Carboniferous Limestone immediately beneath.
