The first route concerns the islet of Nea Kameni, the youngest landmass in the eastern Mediterranean. Starting from the Fira Bay, the Kato Fira small harbor, or the Gialos of Thera, the first lava flows we encounter while sailing towards Nea Kameni are the fronts of the fiery rivers from 1925, which today we observe as black glassy rock, the lava flows of Daphne. Their fragmentation into enormous boulders is due to the rapid cooling of the molten rock when it enters the sea.