>live in centre of my capital

>one evening out walking my dog

>standing on the street corner while waiting for my dog to finish shitting

>hear a weird sound coming from somewhere near

>it repeats between intervals of around 10 seconds

>realize it's coming from the sewers

>put my head against the sewer opening that is on the side of the sidewalk

>hear now that it's a woman's voice

>it's a pre-recorded automated voice

>giving flight announcements for a flight going from my city to Brussels

>i stood there a good while with my head in the sewer opening listening

>old woman comes walking towards me

>she gives me a peculiar look

>tell her there's a voice coming from the sewers

>she rushes quickly away from me, probably thinking i'm fucking nuts

>decide to just leave it be, pick up my dog's shit and move on

>