Eventually in Santorini: Hike the caldera path between Fira and Oia. Boat scenic tour of the caldera. Supper at Athenian House or Metaxi Mas.
https://www.fxstat.com/en/user/profile/i0bpjkv065-347198/blog/36716389-7-Things-About-Santorini-tour-Your-Boss-Wants-to-Know