Taking public transportation in an unfamiliar city can be daunting.
But if the city you're in has an effective system, there's no need to waste money on cab fare when you could be saving money — and maybe even getting somewhere faster — with public transport.
We've rounded up some of the best public transport systems around the world, from Paris, France, to Seoul, South Korea.
Next time you're in one of these cities, hop on for a ride.
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