I grew up in Ottawa and was going to try and name a place but couldn't think of one either.

I'd say the same for Vancouver or Victoria.

One of the smallest and most richest countries in the world, the city of Rio de Janeiro is bigger in size and in population, just the city.

Not even Geylang?

They indeed would roam the streets, but to claim safety you need reliable statistics which didn't exist in USSR. So, your safety claim is likely overstated

OK, I'll rephrase to "a lot of other cities in the world" - London, New York, Paris, Warsaw, Berlin, Rome. All of them have their fair share of dodgy places that you should approach cautiously.

What city do you live in, by the way? The only city I know of deservedly with this reputation is Singapore.