Eristos is an easily accessible beach on the island of Tilos. It is quite secluded and situated a mere 3 kms away from Megalo Horio. There are a couple of places you can stay as well as camping site. There is a cantina on the beach.
In Kantouni on the island of Kalymnos you will basically find a beach and a coffee shop. Nothing much other than that really except for a few houses here and there and a beautiful church at the end of a paved pathway.