Maria's cave house is located right at the very end of Oia, so it's a great location for watching the famous sunset and right at the top of the stairs leading down to the water (which also has a great view). When we arrived in Oia, Maria's porter was super prompt to meet us and guide us to the house, and he showed us all we needed to know. The next day once we were settled, Maria came by as well to meet us and even helped us book a day-long boat tour of Santorini (highly worth it!)