At the beginning of the route in Martsalos Gorge you will find the lovely church of Panagia Martsaliani, dedicated to the Annunciation. The church, built in a cave, was used as a catacomb at the time of Christian persecutions. Just a few centuries earlier, it came back to light by chance, when a shepherd found it and realized that it was covered by rocks. An icon of the Annunciation was then found, which is now kept in the monastery of Odigitria. When the Church celebrates on August 15, many visitors come from the Mesara Plain to Martsalo. The rocks of the cave are full of frescoes and an impressive dome hangs from the roof of the cave. The chapel is believed to have been built on the site of a Minoan tomb, as it has a strange conical shape that reminds of an oven.