It lies near the lower end of the fine Nant Ffrancon (valley of the Ogwen stream).
These two passes are joined by Nant Gwynnant (stream, or valley, of the white or happy valley, or stream), skirting the S.E.
Nant Colwyn runs N.W.
The place is a centre for artists, geologists and botanists, for the ascent of Snowdon, Moel Siabod, Glydyr Fawr, Glydyr Fach, Tryfan, &c., and for visiting Llyn Ogwen, Llyn Idwal, Twll du (Devil's Kitchen), Nant Ffrancon and the Penrhyn quarries.
Nant, a ravine, hence also a brook - Nantgwyllt, Nannau, Nantgaredig.