Just so you know—Greece’s plumbing system is archaic and inadequate, so you’re not supposed to flush toilet paper lest you back up the sewer system (and thereby start an international incident, since you’d be doing so as an American citizen). Instead you are to toss your used toilet paper in the small trash receptacle that you’ll find next to the toilet. I know this sounds gross, but after a week it becomes second nature and you’ll hardly think about it.

Shop, hotel, and restaurant keepers empty these trash receptacles regularly. Furthermore, most such receptacles have lids, so restrooms stay fairly sanitary and don’t smell bad at all.

Typical Greek toilet with its receptacle for used paper