Dolwyddelan Castle is one of the best castle outings from Betws-y-Coed, standing above the Lledr Valley with a distinctly Welsh mountain setting. It is smaller than the great Edwardian castles on the coast, but that is part of its appeal.
The site is closely tied to the princes of Gwynedd and feels rooted in the landscape rather than imposed on it. The walk up, views, and plain stone keep make it a strong stop for travellers exploring Snowdonia's history between hikes.