Most of the cafes where the American writers who flooded Paris in the 1920s are mostly still there. It's the best free thing to do there. I've lead some walks for friends and would be happy to take you along next time!
Books like Walks in Hemingway's Paris and Walks in Gertrude Stein's Paris give addresses and directions.
Send your feedback or queries to been.there@guardian.co.uk
Search Been there