To honor European Music Day on June 21, the Greek National Opera organized a small flash concert in Syntagma metro station in Athens, in front of hundreds of surprised passengers, young and old, who enjoyed arias from The Barber of Seville and Faust, as well as the Libiamo duet with chorus from La Traviata. Netizens praised this happy incident on Twitter [el]. You can watch the videos here, here and here.