Tomb of the unknown soldier

Two soldiers guard the memorial day and night in one hour shifts, ignoring the tourists. Every now and again they swap sides, starting and stopping simultaneously. I think I eventually worked out what the secret signal was, but I don’t recall now. (It was twenty years ago, cut me some slack…)

I notice they have presented a brief tribute to the Isle of man here in passing. (Three legs, geddit?)

P.S. If you haven’t worked it out, it is in Athens, Greece.