Very enjoyable experience. We visited the archaeological museum and the Delphi site (total time there of 2 hours and 20, maybe a little short for me, but reasonable for the times). The very kind, helpful and prepared guide (he introduced us during the trip the site and illustrated the surroundings) then made us visit the ancient temple of Athena and took us for lunch in a typical good restaurant (abundant dishes and low prices ). Finally he accompanied us to Arachova and showed us the city from the bell tower, as well as the museum on local traditions.