I have been Greece last year and I went to Meteora where to first european christians lived. They still have a old church and monastery. The old church and monastery were very amazing.
My trip begun at Thesseloniki the second great city of Greece. The old white tower and sea side was worth to sea. My second adress in Greece was Meteora, The Churc town.
They builded them up to some old volcanic rocks. It was took 3 hours car trip to get there from Selonica.
And the using camera is forbidden inside the fecility but I got this from top of the main monastery rock. Amazing view and amazing country.