Pors Poulhan allée couverte: On a headland overlooking the Baie D'Audierne, this allée couverte is in a tremendous position. #TombTuesday Excavations have shown it to have not only been constructed and used by neolithic flint workers, but also for burials in the bronze age, iron age, and by the Gallo-Romans. In the middle ages it was used as a quarry for building stone, - since then it has been used as a military look out post, and as such was blown up during the second world war.