"Community cats" seem to be becoming a more commonplace thing to see around the world. I love cats (even helped care for a feral cat colony near my work, many years ago) but feral cats only "work" if the community has a "trap, neuter, release" program... otherwise the populations can really get out of hand and become a nuisance.
You can usually tell because they either clip a little notch out of the tip of one ear or clip the tip of it off; looks like the cat was in a fight, but it's actually a marker.
Those are some pretty healthy looking cats in your photos, so I'd like to think they have a caretaker and don't just depend on tourist handouts.
Surprised as you might be, they actually eat cat food. I have seen empty cat food can by the plenty in nearby trash bins. They look better cares for compared to many house cats