Directions to arrive to the tour are not clear. They say post office but there are two of them in the village.
Also, in our case the free tour began early and left us behind. It was suposed to began at 11 but the free tourer told us to go a little early to "organise" beacuse we were big group. We had a problem with the car and we arrived at 10.58 and the group had already left. We called him and he did not give clear directions so we could join t'he group. Very bad experience taking into account that it is the only free tour available in Sozopol and only happens once a day.