Tyddyn Môn is located in the village of Brynrefail on the Isle of Anglesey.
Anglesey has two road bridges joining it to the mainland, the old Menai Suspension Bridge and the newer Britannia Road and Rail bridge.
If using the old bridge, go straight on at the two roundabouts you'll encounter after crossing the bridge, (the second one, near a Shell garage you need to go slightly right), up the hill to a third roundabout, where you need to turn right onto the A5025.
If using the Britannia Bridge, stay on the A55 for just a few hundred yards having come off the bridge (don't take the first left) and take the slip road up to the A5025, turning right at the top of the slip.
In both cases now, proceed along the A5025 for approximately 9 miles, passing through Pentraeth and Benllech, until you come to a roundabout, where you should turn left towards Amlwch. (Right at this roundabout would take you down into Moelfre).
Proceed for another 2 miles through Llanallgo (church on the left), along a short straight and then down a steep hill, then up the hill and a sharpish left hander that leads into Brynrefail.
For those using Public Transport, Bangor Station is right next to the bus stop for the No.62 which will bring you to Brynrefail. See the Arriva timetable for the route here, and the map below.