Of all the ancient sites I was able to visit in Kos Town, the Western Excavation Area was my favorite. It beat the ancient Agora in terms of mosaics and quality of ruins. It’s not quite as good as the Asklepeion just outside of town, but it’s worth seeking out. Admission to the site is free.
The first part of the Western Excavation Area I explored contained the remains of a large gymnasium and nymphaeum.
The gymnasium and nymphaeum contain some impressive mosaics.
Also impressive is the Roman road that cuts through the site.
At the end of this area I came to a Christian basilica built over a set of Roman baths. There were a few faded frescoes to be found.
The last part of the archaeological site I found was a mosaic of the Kidnapping of Europe.