请大侠帮看一下希腊行程

本想去Crete二天，但那个岛太大觉得以后放一周才能看过来。

现在是多出二天，有建议加个地方还是行程中哪些点可以多留一，二天？多谢！

5/8, Arrive Santorini

5/9, Santorini

5/10, Santorini

5/11, Morning ferry to Mykonos

5/12, Afternoon ferry to Athens

5/13, Athen to Zakynthos

5/14, Zakynthos

5/15, Zakynthos

5/16, Zakynthos to Athens

5/17-5/18, 2 days tour to Delphi & Kalambaka

5/19-5/20, Athens

5/21-5/22, ??

5/23. Fly home