Nestled beneath the UNESCO World Heritage site of Mystras Castle in the Peloponnese, Euphoria Retreat is a transformative wellness sanctuary spanning 90 acres of private pine forest. Founded by cancer survivor Marina Efraimoglou, this adults-only retreat (ages 14+) combines Ancient Greek Asclepian medicine with Traditional Chinese Five Element theory and cutting-edge 3GL metabolic testing. The Byzantine-inspired architecture features 45 rooms with Taygetos Mountain views, an iconic spherical indoor pool, and a 5-story spa carved into the hillside.