Villa Ilios is in Fira, the capital of Santorini, on the provincial road towards Perissa, just outside the centre. The town stretches along the edge of the caldera, with white houses, narrow paved lanes, cafés and tavernas, and views of the volcanic islet. The guest house suits you if you prefer to stay a little outside town, with a pool and garden, and head to the caldera for a walk and a meal.
In Fira, it is worth visiting the Museum of Prehistoric Thera, 700 m away, with finds from the prehistoric settlement of Akrotiri, and the Archaeological Museum of Thera, with statues and pottery from ancient Thera. The Central Bus Station is 750 m away, with buses to Oia, known for its sunsets over the caldera, and to the black volcanic sand beaches, including Monolithos, Kamari and Perissa. The airport is 2.9 km away.
The best time for beaches and cruises is from May to October. In July and August, the meltemi often blows and the town is busier, while in September the sea is still warm. One idea for your day: a morning visit to the museums, an afternoon at the beach and sunset in Oia. Exo Gialos Beach is 2.7 km away if you want a day by the sea. Outside the season, Fira becomes noticeably quieter, and the museums are the best reason to go for a walk.