The fifth route covers the area of the northeastern cliffs of the Santorini caldera, from Imeroviglito Ammoudi Bay below Oia, as well as the tuff ring of the Koloumpos hill on the northeastern coast of Santorini. It is initially suggested as a hiking route, crossing the well-preserved trail onthe caldera rim from Imerovigli to Oia. Afterwards, transportation by vehicle can be used toreach Koloumpos.