The true hotspot locations for the Welsh Language, is from Caernarvon towards Penrhyndaedraeth.
llanberis has seen so many incomers over the years, that Welsh is no longer the mother tongue of many of the locals, you can hear it spoken by some of the locals, but not everyone living there is fluent in the language.
Caernarvon, Penryhndaedraeth, and communities in and around the main A487 road towards Porthmadog, this is the heart land of the welsh language.
Pant Glas, the tiny village along the A487, is where Bryn Terfel was born, and this community of around eight farms, is totally welsh.
I am almost willing to bet that every habitant of Pant Glas has Welsh as their first language.
My mother who was born in Llanfair PG on Anglesey, could not speak or understand any English until she was seven, Welsh was the only language she knew or could understand.
Anglesey also has its large welsh speaking areas, but even Ynys Mon is losing its Welsh identity as the decades roll on.
Visit the community of Rhostryfan outside Caernarvon, and virtually the entire community are fluent in the language.
The llyn Peninsula has lost its Welsh identity, and so has Porthmadog, but just about every small community along the A487 back towards Caernarvon, is where the welsh heartland can be found.