These traditionally dressed members of the elite Presidential Guard (Evzones) watch over the Tomb of the Unknown Soldier in Constitution Square in the capital city of our mystery country. The changing of the guard happens every hour on the hour.
At 11:00 on Sunday mornings, the changing of the guard is a full-on military parade, with a band and over 100 Evzones in full dress uniform. This is a real spectacle and worth scheduling around, if you like that sort of thing.
Can you name that country?
See below for answers.