KOS Partner Property Photo | Neptune Luxury Resort One of the most popular islands in the Aegean Sea and part of the Dodecanese Islands. It’s famous for its historical sites, lush vegetation and breath-taking beaches. Mastichari, Kos NEPTUNE LUXURY RESORT A 5-star beachfront resort offering unparalleled comfort and luxury in the heart of Kos in the Dodecanese Islands. Read More Have a property in Kos? Join The HART Family Get in touch with us now to see how HART can help streamline and power your hospitality operations!