Dolwyddelan is located on the A470 between Blaenau Ffestiniog and Betws-y-Coed deep in the Snowdonia National Park. It is the site of Dolwyddelan Castle, built in the early 13th century by Llywelyn the Great, ruler of Snowdonia. The castle was built to control a strategic pass though the vast mountain range. Restored in victorian times, the castle now provides an excellent vantage point to take in the spectacular mountain vistas all around the site.

As well as by road, this small town can be reached by train on the Conwy Valley Line.