Dyffryn Mymbyr

Gallt yr Ogof is a mountain in Snowdonia, North Wales. It is a subsidiary top of Glyder Fawr, and is the most easterly point in the Glyderau mountain range, not including the hill Cefn y Capel. Gallt yr Ogof is 763 metres high.It is a sister peak to Y Foel Goch, which is located on the ridge heading west to Glyder Fach. As its name suggests there is a cave to be found on the cliffs on the precipitous eastern side of the peak.

Llynnau Mymbyr are two lakes located in Dyffryn Mymbyr, a valley running from the village of Capel Curig to the Pen-y-Gwryd hotel in Snowdonia, north-west Wales. The A4086 runs along their northern banks. Strictly speaking this is one lake, originally called Llyn Mymbyr, with a maximum depth of 30 feet. About 3/4 mile long in total, a delta has built up midway along the north shore, and this has to all purposes cut the lake in two - hence the plural name. The river feeding the lakes is the Nantygwryd (or Nant-y-gwryd), which has its source at Llyn Cwm-y-ffynnon, also marked on maps as the Nant Gwryd, which is a tributary of the Afon Llugwy. The two rivers join at Capel Curig. The lake was used for fly-fishing and sub-aqua courses in the 1960s and is still used today as a canoe training resource by Plas y Brenin and other local education authorities.

Y Foel Goch is a mountain in Snowdonia, north-west Wales, and is a sister peak along with Gallt yr Ogof to Glyder Fach. Between Glyder Fach and its summit lies Llyn Caseg-fraith, a popular lake for photographing Tryfan and its reflection. The summit is grassy with a few small rock outcrops and is marked with a small cairn. The views are limited to the bulky neighbours of Moel Siabod, Tryfan and Glyder Fach. The ridge continues eastwards to Gallt yr Ogof.

Moel Siabod (Welsh for "bare hill" with unknown meaning of 'Siabod'), is a mountain in Snowdonia, Wales, which sits isolated above the village of Dolwyddelan. At 872 metres (2,861 ft), it is the highest peak in the Moelwynion mountain range. The UK National Mountain Centre, Plas-y-Brenin, is located at the foot of Moel Siabod. From the top of the mountain, it is reputedly possible to see 13 of the 14 highest peaks in Wales on a clear day without turning one's head.

Plas y Brenin, located in Conwy County Borough, Wales, is a National Outdoor Centre owned by Sport England. The centre is situated in Dyffryn Mymbyr, the Mymbyr Valley, in Snowdonia and is less than a quarter of a mile south-west of the centre of Capel Curig on the A4086 road.

Capel Curig (Welsh pronunciation: [ˈkɑːpɛl ˈkɨːrɪɡ]; meaning "Curig's Chapel") is a village and community in Conwy County Borough, Wales. Historically in Caernarfonshire, it lies in the heart of Snowdonia, on the River Llugwy, and has a population of 226, reducing slightly to 206 at the 2011 census. It lies at the junction of the A5 road from Bangor and Bethesda to Betws-y-Coed with the A4086 road from Caernarfon, Llanberis, Pen-y-Pass and Pen-y-Gwryd. It is surrounded by hills and mountains, including Moel Siabod and Pen Llithrig y Wrach.

Llyn-y-Foel ("lake of the mountain" in Welsh) is a lake in Snowdonia, Wales. It is approximately 240 m across, 120 m wide and up to 2 m deep. It lies at 535m altitude at the foot of the main ridge of Moel Siabod at grid reference SH 714 547. The main outflow, at the south-east of the lake, forms one of the main tributaries of Afon Ystumiau, which eventually feeds into Afon Lledr and subsequently into Afon Conwy. The deep brown colour of the water, caused by the peat in the immediate area, gives rise to a unique type of brown trout which can only be found in this lake. Although the lake bears the name Llyn y Foel, it does have another name - Llyn Llygad yr Ych, the Lake of the Ox's Eye - which recounts a tale about an ox that lost an eye under the strain of pulling the dreadful afanc from Betws y Coed to Glaslyn below Snowdon. See Perrin, Jim. Visions of Snowdonia (London: BBC Books, 1997) ISBN 0-563-38302-X.

Ffynnon Llugwy (English: Llugwy spring) is a lake in the Carneddau range of mountains in Snowdonia, North Wales. It lies at a height of about 1,786 feet (544 m) and covers an area of some 40 acres (16.19 ha). It has a maximum depth of 146 ft (45 m).Since the early twentieth century water has been taken from its outflow, Afon Llugwy to feed Llyn Cowlyd via a series of leats. Since the mid 1970s the lake has additionally acted as a reservoir for Bangor and eastern Anglesey, which necessitated the laying of an 11-mile pipeline to the water treatment works at Mynydd Llandegai.It is the source of the River Llugwy (Welsh: Afon Llugwy) which flows via Capel Curig and Betws-y-coed before becoming a tributary of the River Conwy.

Llyn Cowlyd is the deepest lake in northern Wales. It lies in the Snowdonia National Park at the upper end of Cwm Cowlyd on the south-eastern edge of the Carneddau range of mountains, at a height of 1,164 feet (355 m) above sea level. The lake is long and narrow, measuring nearly 2 miles (3 km) long and about a third of a mile (500 m) wide, and covers an area of 269 acres (1.1 km2). It has a mean depth of 109 feet (33 m) and at its deepest has given soundings of 229 feet (70 m), this being some 45 ft (14 m) greater than its natural depth, the water surface having been raised twice by the building of dams.The surrounding hills drop steeply to the water's edge, from Cefn Cyfarwydd and Creigiau Gleision to the east, and Pen Llithrig y Wrach to the west, and as a consequence have not been forested in the 20th century, as were the slopes of neighbouring Llyn Crafnant. Indeed, there is not a tree to be seen, and the general aspect is one of bleakness. Dependent on the weather conditions, the waters often appear dark. The supply of water to Llyn Cowlyd is assisted at its south-western end by a leat which runs roughly east–west along the 1370-foot contour to the south and west of the lake, along the Llugwy valley. It is also fed by water from Llyn Eigiau. Llyn Cowlyd can be reached by road from Trefriw, some 3 miles (5 km) to the east, although the metalled road stops at a gate, the best part of a mile from the lake itself, beyond which private vehicles are not permitted. Llyn Cowlyd can also be reached by foot from Capel Curig, some 2 miles (3 km) away, from the ridge of Cefn Cyfarwydd, or from above Dolgarrog. A good path runs along the north-western shore of the lake. The stream which flows from Llyn Cowlyd is called Afon Ddu. This flows into the river Conwy, passing Pont Dolgarrog on the B5106 road, just south of the village of Dolgarrog. The gorge cut by the river at this point is popular for gorge walking.

Llyn Bochlwyd (Welsh pronunciation: [ɬɨ̞n boːχluːɨ̯d, ɬɪn boːχlʊi̯d]) is a lake in Snowdonia, Wales, in Conwy County Borough. It lies in Cwm Bochlwyd, near Llyn Ogwen in the Glyderau mountain range.

Tryfan Welsh pronunciation: [ˈtrəvan]) is a mountain in the Ogwen Valley, Snowdonia, Wales. It forms part of the Glyderau group, and is one of the most recognisable peaks in Britain, having a classic pointed shape with rugged crags. At 917.5 metres (3,010 feet) above sea level, it is the fifteenth-highest mountain in Wales. Tryfan was voted Britain's favourite mountain by Trail magazine.Between the mid-1980s and June 2010, its accepted height was 915 metres (3,002 ft). However, it was resurveyed using accurate GPS measurements and found to be 2.4 metres (eight feet) higher (which the pre-1980s surveys also recorded).Tryfan is said to be the final resting-place of Sir Bedivere (Bedwyr) of Arthurian legend.

The Borough of Arfon was local government district with borough status from 1974 to 1996, being one of five districts in the county of Gwynedd, north-west Wales.