All Seniors spend their "Humanities", “Theory of Knowledge”, or "AP Art History" retreat, which is part of their course which fulfills the TASIS Humanities graduation requirement, in Greece. The students travel in four groups of max. 25 students each, with rotating itineraries. Groups 1A & 1B start their trip in Athens and fly back from Crete, and groups 2A & 2B start in Crete and fly back from Athens.