Dolgellau in the context of River Wnion

The White Book of Rhydderch (Welsh: Llyfr Gwyn Rhydderch, National Library of Wales, Peniarth MS 4-5) is one of the most notable and celebrated surviving manuscripts in Welsh. Mostly written in southwest Wales in the middle of the 14th century (c. 1350) it is the earliest collection of Welsh prose texts, though it also contains some examples of early Welsh poetry. It is now part of the collection of the National Library of Wales, having been preserved in the library at Hengwrt, near Dolgellau, Gwynedd, of the 17th century antiquary Robert Vaughan, who inherited it from the calligrapher John Jones and passed it to his descendants. The collection later passed to the newly established National Library of Wales as the Peniarth or Hengwrt-Peniarth Manuscripts.

What was one manuscript was divided into two in the medieval period and has been bound as two separate volumes, known as Peniarth MS 4 and Peniarth MS 5. Peniarth MS 4 contains the most important material: medieval Welsh tales now collectively known as the Mabinogion. Peniarth MS 5 (the first part of the original manuscript) contains Christian religious texts in Welsh, mostly translated from Latin and French, including Lives of various saints and a tale of Charlemagne.

Aran Fawddwy is a mountain in southern Snowdonia, Wales. It is the highest point (county top) of the historic county of Merionethshire (for local government purposes, it lies within the current council area of Gwynedd). It is the highest peak in the Aran mountain range, the only peak in Wales outside North Snowdonia above 900m, and higher than anywhere in the United Kingdom south of Northern Snowdonia. The nearest small settlements to the mountain are Dinas Mawddwy to the south, Llanymawddwy to the southeast, Llanuwchllyn on the shores of Llyn Tegid (Bala Lake) to the north, and Rhydymain to the west. The nearest settlements with around 2,000 people are Bala and Dolgellau. On the eastern slopes of Aran Fawddwy is the small lake named Creiglyn Dyfi, the source of the River Dyfi. Its sister peak is Aran Benllyn at 885 metres (2,904 ft). There is also a middle peak: Erw y Ddafad-ddu.

The A470 (also named the Cardiff to Glan Conwy Trunk Road) is a trunk road in Wales. It is the country's longest road at 186 miles (299 km) and links the capital Cardiff on the south coast to Llandudno on the north coast. While previously one had to navigate the narrow roads of Llanidloes and Dolgellau, both these market towns are now bypassed due to extensive road modernisation. The 26 miles (42 km) from Cardiff Bay to Merthyr Tydfil are mainly dual carriageway, but most of the route from north of Merthyr to Llandudno is single carriageway.

Cadair Idris (Welsh pronunciation) or Cader Idris is a mountain in the Meirionnydd area of Gwynedd, Wales. It lies at the southern end of the Snowdonia National Park near the town of Dolgellau. The peak, which is one of the most popular in Wales for walkers and hikers, is composed largely of Ordovician igneous rocks, with classic glacial erosion features such as cwms, moraines, striated rocks, and roches moutonnées.

Porthmadog (Welsh: [pɔrθˈmadɔɡ] ), originally Portmadoc until 1972 and known locally as "Port", is a coastal town and community in the Eifionydd area of Gwynedd, Wales, and the historic county of Caernarfonshire. It lies 5 miles (8 km) east of Criccieth, 11 miles (18 km) south-west of Blaenau Ffestiniog, 25 miles (40 km) north of Dolgellau and 20 miles (32 km) south of Caernarfon. The community population was 4,185 in the 2011 census and was put at 4,134 in 2019. It grew in the 19th century as a port for local slate, but as the trade declined, it continued as a shopping and tourism centre, being close to Snowdonia National Park and the Ffestiniog Railway. The 1987 National Eisteddfod was held there. It includes nearby Borth-y-Gest, Morfa Bychan and Tremadog.

Hengwrt (Welsh for 'old court') was a mansion near Dolgellau in Meirionnydd, Gwynedd. It lay in the parish of Llanelltyd near the confluence of the River Mawddach and River Wnion, near Cymer Abbey. With medieval origins, it was rebuilt or remodelled on several occasions before being demolished in 1962. It is remembered as the original home of the important collection of the Peniarth Manuscripts, now in the National Library of Wales.