The island of Delos near Mykonos, near the center of the Cyclades archipelago, is one of the most important mythological, historical, and archaeological sites in Greece.

Rineia or Rhenea (Ρήνεια), anciently Rheneia (Ancient Greek: Ῥήνεια) or Rhenaia (Ῥηναῖα), or Rhene (Ῥήνη), is a Greek island in the Cyclades. It lies just west of the island of Delos and further southwest of the island of Mykonos, of which it and Delos are administratively a part.

Source: Wikipedia