Erechtheion is an ancient temple located on Acropolis. In the photo you can see the Porch of the Caryatids, famous fot its six female figures as supporting columns. Really impressive, although they are not original. Original figures can be seen in the Acropolis Museum, and there only five of them, not six. The sixth one is, as far as I remember, in Louvre in Paris.
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From @kinia