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.