Greece is littered with Greek ruins: agoras, acropolis and amphitheatres. Places you have probably never heard of, e.g. Lindos on Rhodes, have amphitheatres that would make a medieval king proud. As such, I appreciate the huge tentative site as it guides your travel to lesser (and still great) antiquity sites to visit while you are in the area.

Excluding the already inscribed WHS (Delphi, Epidauros) and the buffer zone one (Athens), I have seen two amphitheatres in Greece: Argos and Lindos. Lindos was a day trip in Rhodes, Argos was on my way after visiting Mycene. These are nice sprinkles to a Greece trip. They come with an agora and in the case of Lindos with an acropolis, too. But are they WHS material?

OUV

If any of the proposed amphitheatres were in Germany, they would definitely have OUV. But for Greece and ruins from antiquity the requirements are substantially higher, a bit like Italy. Also, as I understand it (and from what I have seen on my travels), the best preserved amphitheatre (Epidauros) is already inscribed. As are the ones in Delos and Epidauros. And the Athens' one practically is, too, as you will visit it, when you are visiting the Akropolis.

I am not convinced that creating a serial site combining inscribed and further amphitheatres adds anything to the list. This should not keep you from visiting if you are in the area, though.

Getting There

For the inscribed sites, check their respective page. For Argos, you will pass through when visiting Mykene. It's a 20min  walk from the bus stop. For Lindos, we took a bus from Rhodes.