It's all Greek to me

I took this picture somewhere in between 1896 Olympic Stadium and my hotel in Athens, Greece. An expression says "It's all Greek to me", and which means "Beats me". However, people who I met in Greece spoke nice English, so I didn't feel any language barriers or something like that. On the first day in Athens, just after I got out of the airport, I didn't take a cab and took a metro to Monastiraki. Then, I heard Greek for the first time from the train announcements. It was all Greek to me, but I was not worried about it, I was more like excited.