Thalys is a fast train from Cologne to Paris. It goes around 150 m/h in Germany but picks up speed after Brussels and continues up to 307 km/h till Paris. It costs close to 90 Euro per ticket unless on special. The trains leave every hour so it is very convenient and they stop in the middle of a city. Garre du Nord in Paris. Take a taxi from there to anywhere in Paris around 10-15 Euros, you can take the Metro too but taxi is better in this case.
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