Caldera & Oia Sunset Boat Tour from Santorini. Arriving at Athinios port we board the traditional boat King Thiras. Our first stop is the volcanic island of Nea Kameni where we will walk an ascending soil path to approach the crater of the still active Volcano. T&C: Offer Period: From 03/05/2015 to 10/10/2015 | per adult.