It was discovered in 1902 in kos by the German archaeologist Herzog, to whom the site was indicated persistently by the Koan historian Zaraftis. It is located at about 5 km to the southeast of the city of kos , on the top of a hill from where the view is indeed fascinating.

The three most important, of the 300 known, Asklepieia were those of Trikki, in Thessaly, where the worship of Asklepios originates, of Epidaurus and of Kos, the last being considered as primum inter pares, because in this taught Hippokrate, the greatest physician of the antiquity. it consists of three terraces (Andrea) separated from each other by broad and agnificent marble steps. At the third (the highest) terrace there was a great marble temple of Doric order dedicated to Asklepios. At the second, on the left side, there was another temple of Asklepios. At the second, on the left side, there was another temple of Asklepios and, on the right, a temple of Apollo and an altar of the 4th century B.C. At the first (the lowest) terrace there was a small temple of the reputed physician Xenophon, also a portico and a group of buildings housing the School of Medicine of kos and the Museum of Anatomy and pathology, with exhibits, votive offerings illustrations and descriptions of the cured patients.

The historic tree which is considered by many as the oldest tree in Europe, stands in front of the entrance to the Knights Castle. It’s trunk has a circumference of approx - imately twelve meters, and according to tradition it was under this very tree that Hippokrates taught medicine to his students.Next to the Platanos, there is an ancient Sarcophagus, which during the Turkish occupation was used as a water trough for the nearby Mosque.