Because it offers a unique view over the sea at islands in more than 40 km distance. This is due to the remarkably short distance to the shore (300 m) and its altitude (70 m). The next beach you find right underneath the house at only 300 m distance. In spite of all that it takes only a 6 km drive to reach the city. A place like that is not easily found.
Moreover, I can give you a lot of insider information about places (beaches, water sports, hiking trails, monasteries, archaeological sites, museums, events, restaurants, nightly entertainment, etc.) in English, German or Greek.