From Auray, exit Carnac/Quiberon and follow Belz (D22).
about 2 km before the town of Belz at a place called Kerorel (opposite potier) take
to the left.
Cross a place called "Kerclement", then straight on for about 800m to Keryargon on your left (at the exit of the wooded area).
Address to enter in the GPS:
City: BELZ (56550, Morbihan)
Street: Keryargon (the GPS will suggest a place called "keryargon")