It should be the site of a Byzantine castle, standing on the top to see the view of the town of Oia.
Back to the square, facing the Aegean Sea, left to go to the Blue-top Church, right to the bottom is the best place to watch the sunset.
The ruins of a Byzantine castle, now a sunset terrace, are crowded in the evening.
It's really special, the color and sea water are beautiful
You can visit the whole town on it or go down to the seaside.