Did you stay at the Hotel Athena, perhaps? I tried to spend the night there 13 years ago but all rooms were booked.
I remember well the hauntingly beautiful and dreamlike view at night of the floodlit temples that dotted the Valley of the Temples below Agrigento.
Yes, it was the Hotel Athena. A very lovely place. It also had a restaurant attached that was very good and the whole surroundings were filled with fruit trees, goats and shephards! Heaven.