Celestyal Cruises has developed a reputation for its destination-intensive itineraries, which are ideally suited for travelers interested in fully immersing themselves in the ports they visit. The line’s seven-night “Idyllic Aegean” itinerary aboard Celestyal Crystal, which resumed service in June, serves as a perfect example. Sailing roundtrip from Athens, the ship calls at the Greek ports of Patmos, Rhodes, Santorini, Lavrion, Mykonos, Milos and Agios Nikolaos in Crete. Celestyal offers travelers a robust roster of excursions – along with 12 percent commissions for travel advisors who book them for their clients in advance.