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Get more on Griff's mission to get under the skin of NYC, London and Paris
Join Griff as he discovers the Traffic Control Centre and a secret chapel
Catch Up: Griff heads over the Channel for the final stop in his journey
Meet the human beat box, take a helicopter ride over Manhattan and more
Download the maps and podcasts and let Griff take you on a guided tour
Don't let Griff have all the fun - share your secrets of London, Paris and NYC
Get web exclusive video from all the locations in the first show
