This island is an eight hour ferry ride from Piraeus but once you're on the island, there's cliff jumping, nude beaches, and amazing seafood. It was once a well kept secret to tourists and other Greek islands but now August becomes so packed you're better visiting Mykonos. For more information visit here!
3. Ikaria
This is the ultimate hidden gem! All those pictures you've seen of waves with huge well-like openings and crystal clear water is this island right here. There is no concept of time or days when you're on this island because it's as if life has been set back to default and you're stuck in paradise. For more information visit here!