The Eryri A-Z is the master index to this guide: major mountains, lakes, villages, castles, railways, waterfalls, historic sites and legends, organised alphabetically. Think of it as the index at the back of the book for the whole of Snowdonia, linking into deeper guides on every subject. If you know the name of something in Eryri but aren’t sure where to find out more, start here. For quick facts about the mountain itself, see Yr Wyddfa in numbers and our Yr Wyddfa FAQ.
A
- Aber Falls (Rhaeadr Fawr): 37-metre waterfall beneath the Carneddau, one of the finest in Wales
- Aberglaslyn Pass: dramatic river gorge near Beddgelert, one of the great valley landscapes of Eryri
- Adam and Eve: the twin summit stones on Tryfan; tradition demands a jump between them
- Anglesey (Ynys Môn): island visible from most Eryri summits; linked to the mainland by the Menai and Britannia bridges
- Aran Benllyn / Aran Fawddwy: the highest peaks of the Aran range in southern Eryri
B
- Bala (Y Bala): lake town at the end of Llyn Tegid, a centre of Welsh-language culture
- Beddgelert: one of the most picturesque villages in Eryri; home of the legend of Gelert
- Bethesda: slate quarrying town at the foot of Nant Ffrancon; the Penrhyn dispute of 1900-03
- Betws-y-Coed: often called the outdoor capital of Wales; gateway to the Conwy valley
- Blaenau Ffestiniog: slate capital of Wales; Zip World; Ffestiniog Railway terminus
- Bristly Ridge: Grade 1-2 scramble from Bwlch Tryfan to Glyder Fach
C
- Cadair Idris: southern Eryri’s great mountain; 893m; mountains and sea in one panorama
- Caernarfon Castle: Edward I’s greatest fortress; UNESCO World Heritage Site; Prince of Wales connection
- Capel Curig: mountain crossroads village; base for Tryfan, Snowdon and the Glyderau
- Carneddau: vast mountain plateau in northern Eryri; the largest area of high ground in Wales
- Castell y Bere: lonely Welsh princely castle in the Dysynni valley
- Conwy: medieval walled town; near-complete town walls; UNESCO World Heritage Site
- Crib Goch: Snowdon’s legendary knife-edge ridge; Grade 1 scramble with serious exposure
- Cwm Idwal: glacial corrie; National Nature Reserve; Darwin connection; rare arctic-alpine plants
D-E
- Dinorwig Power Station: pumped-storage hydroelectric power station built inside Elidir Fawr; the largest of its kind in the UK
- Dolbadarn Castle: Welsh princes’ castle above Llanberis, guarding the Llanberis Pass
- Dolgellau: market town at the foot of Cadair Idris; gateway to southern Eryri
- Eryri National Park: Snowdonia, known by its Welsh name since 2022; 823 square miles; established 1951
F-G
- Ffestiniog Railway: the world’s oldest surviving railway company; Porthmadog to Blaenau Ffestiniog
- Glaslyn: copper-green lake beneath Snowdon’s summit; its extraordinary colour is linked to copper minerals in the rock
- Glyderau: the chaotic rocky range between the Llanberis Pass and the Ogwen valley; Glyder Fawr, Glyder Fach, Castell y Gwynt
H-L
- Harlech: clifftop town with a UNESCO castle and Cardigan Bay views
- Harlech Castle: Edward I’s dramatic clifftop fortress; linked to the song “Men of Harlech”
- Llanberis: Snowdon’s base camp village; Snowdon Mountain Railway; Dinorwig
- Llyn Idwal: mountain lake at the heart of Cwm Idwal; National Nature Reserve
- Llyn Padarn: lake at Llanberis; watersports; Llanberis Lake Railway
- Llyn Tegid (Bala Lake): largest natural lake in Wales; home of the gwyniad
M-R
- Moel Siabod: the isolated mountain above Capel Curig; perhaps the finest panoramic viewpoint in Eryri
- Ogwen Valley: mountain crossroads; Tryfan, the Glyderau, the Carneddau and Cwm Idwal all within reach
- Rhinogydd: ancient range in southern Eryri; rugged, remote, rarely crowded
S-Y
- Slate landscape: UNESCO World Heritage Site; Penrhyn, Dinorwig and Llechwedd
- Snowdon Mountain Railway: Britain’s only public rack-and-pinion railway; 1896; Llanberis to the summit
- Swallow Falls: one of the most visited waterfalls in Wales; Betws-y-Coed
- Tryfan: home of Britain’s most famous easy scramble; North Ridge; Adam and Eve summit stones
- Welsh language (Cymraeg): Britain’s oldest living language; the everyday language of much of Eryri
- Yr Wyddfa (Snowdon): highest mountain in Wales and England; 1,085m; six main routes