Dinas Cromlech

The Llanberis Pass (Welsh: Bwlch Llanberis; alternative English name, Pass of Llanberis) in Snowdonia carries the main road (A4086) from the south-east to Llanberis, over Pen-y-Pass, between the mountain ranges of the Glyderau and the Snowdon massif. At the bottom of the pass is the small village of Nant Peris.

Arfon is a constituency of the Senedd. It was created for the former Assembly's 2007 election. It elects one Member of the Senedd by the first past the post method of election. Also, however, it is one of nine constituencies in the North Wales electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of proportional representation for the region as a whole.

Crib Goch is described as a "knife-edged" arête in the Snowdonia National Park in Gwynedd, Wales. The name means "red ridge" in the Welsh language. The highest point on the arête is 923 metres (3,028 ft) above sea level. All routes which tackle Crib Goch are considered mountaineering routes in winter or scrambles in summer—meaning that they must cross "graded territory" as defined in Steve Ashton's Scrambles in Snowdonia. The easiest of these lines (the ‘bad step’ part of the route) is given a scrambling grade of Grade 1 (the most difficult being Grade 3—routes more difficult than Grade 3 are considered rock climbs).

The Glyderau (a Welsh plural form, also known in English as the Glyders) are a mountain group in Snowdonia, North Wales. The name derives from the highest peaks in the range, Glyder Fawr and Glyder Fach. According to Sir Ifor Williams, the word "Glyder" derives from the Welsh word "Cludair", meaning a heap of stones. The Glyderau stretch from Mynydd Llandegai to Capel Curig, and include five of Wales' fourteen or fifteen summits over 3000 feet; these include Tryfan, considered one of the finest mountains in Wales and one of the few mountains on the British mainland requiring scrambling to reach the summit. The eastern half of the range in particular, including Glyder Fawr, Glyder Fach and Tryfan, is very popular with walkers and climbers. Dinorwig Power Station, a hydroelectric pump-storage system, is located in a man-made cavern within Elidir Fawr. The slopes of the Glyderau also include the lake Llyn Idwal, and a number of classic climbing areas such as Rhiwiau Caws.

Nant Clogwyn y Geifr (English: Devil's Appendix) is the tallest single-drop waterfall in Wales and one of the tallest in the United Kingdom. It is a plunge style waterfall located on the Clogwyn y Geifr cliffs beside Twll Du in Cwm Idwal, Snowdonia, Wales. It is formed where a small stream falls for approximately 305 feet (93 metres) to reach the slopes above Llyn Idwal. Depending on flow and the ambient temperature, it can be either an ice climbing route, a single drop waterfall, or a broken waterfall.

Y Garn is a mountain in Snowdonia, North Wales, part of the Glyderau. It is one of the Welsh 3000s — the 15 summits in Wales over 3,000 feet (914.4 metres) in height. It is the tenth-highest peak in Wales. Moderate snow accumulations can take place on the western-sloping side of the mountain from October to May. The south-westerly side of the mountain slopes gently down to the Nant Peris valley. The other, north-easterly side is of a different character, consisting of two steep-sided cwms, Cwm Clyd and Cwm Cywion, and finally Llyn Idwal and Ogwen Cottage. Along the ridge to the north lies Elidir Fawr, while to the south-east is the top of the Twll Du and Glyder Fawr.In 2011 three people were walking on Y Garn when they went over a cornice overhanging a ridge. About 50 metres of snow collapsed when the cornice gave way creating an avalanche and a person died when they fell 150 metres.

Llyn Llydaw (from the Welsh meaning Brittany lake) is a natural lake in Snowdonia National Park on the flanks of Snowdon, Wales' highest mountain. This long thin lake has formed in a cwm about one-third of the way up the mountain. It is one of the most visited lakes in the United Kingdom. Thousands of people every year visit Snowdon and many walk past this lake on the Miners' Track.

Cwm Idwal is a cirque (or corrie) in the Glyderau range of mountains in northern Snowdonia, the national park in the mountainous region of North Wales. Its main interest is to hill walkers and rock climbers, but it is also of interest to geologists and naturalists, given its combination of altitude (relatively high in UK terms), aspect (north-facing) and terrain (mountainous and rocky). In a 2005 poll conducted by Radio Times, Cwm Idwal was ranked the 7th greatest natural wonder in Britain.

Glaslyn (Welsh: Blue lake) is a lake in the Snowdonia National Park in Gwynedd, north-west Wales.

Pen-y-Pass is a mountain pass in Snowdonia, Gwynedd, north-west Wales. It is a popular location from which to walk up Snowdon, as three of the popular routes (the Miners Track, the Pyg Track and the ascent via Crib Goch) can be started here. Glyder Fawr, to the north, is also accessible from here. Situated at the high point of the Llanberis Pass at an elevation of 359 metres (1,178 ft) – about a third of the height of Snowdon – the road was built in the 1830s to allow ore from the mines on Snowdon to be transported to Llanberis. It would be taken down the Miners Track to a store-house at Pen-y-Pass first. Previously, the miners had had to move the ore over the Snowdon summit and down to Beddgelert, which is located at around a third the height of Snowdon. The Llanberis pass road extends beyond Pen-y-Pass to join the Beddgelert-to-Capel Curig road at the Pen-y-Gwryd hotel. That notable climbing hotel was used as a base by Sir John Hunt, Baron Hunt and his team whilst training for the successful 1953 expedition to Mount Everest and equipment and autographs from that and other expeditions may be seen in the Everest Room. The former Gorphwysfa Hotel at Pen-y-Pass is now a youth hostel, bar and café operated by YHA, and opposite is an information centre and café and a Snowdonia National Park-run car park. There is also a car park half way down Llanberis Pass in Nant Peris village as well as others in Llanberis village. There is a park and ride bus service to Pen-y-pass car park, which is the hub of the year-round Sherpa bus network provided by Express Motors and GHA Coaches. This service links Pen-y-Pass to Llanberis, Capel Curig, Betws-y-Coed, Beddgelert, Porthmadog, Rhyd Ddu and Waunfawr.

Llyn Cwm-y-ffynnon is a lake in Snowdonia, below the summit of Moel Berfedd in Cwmffynnon. The lake's original name was Fynnon Mymbyr as outlined in Llywelyn ap Iorwerth's charter of 1198. As the name suggests, the lake nestles in a short valley, a cwm, high above the Pen-y-Gwryd hotel. The lake is the source of the Nantygwryd (originally Y Mymbyr), river which in Welsh translates to Pen-y-Gwryd. Prior to 1198 the name Gwryd did not exist in the Mymbyr Valley or Dyffryn Mymbyr. This would suggest that the name "Gwryd" has appeared at a later date for whatever reason, for which there is limited data. The river which flows from here forms part of the county boundary between Gwynedd and Conwy county borough.

Llyn Idwal is a small lake (approximately 800 m by 300 m, or 28 acres) that lies within Cwm Idwal in the Glyderau mountains of Snowdonia.It is named after Prince Idwal Foel, a grandson of Rhodri Mawr, one of the ancient Kings of Wales. Legend states that the king's unfortunate offspring was murdered by being drowned in the lake. In fact Idwal Foel died in battle against the Saxons in 942 and an alternate version claims that he was cremated beside the lake, as was the burial custom for Celtic nobility. A number of small streams flow into Llyn Idwal from around Cwm Idwal. One small river flows out and joins the Afon Ogwen river at Pont Pen-y-Benglog near Ogwen Cottage, immediately above the Rhaeadr Ogwen waterfall.