Here are some of the largest tidal ranges in the world:
12.9m: Bay of Fundy, Nova Scotia
12.5m: Ungava Bay, Quebec
12.3m: Avonmouth, UK
11.4m: Granville, France
10.4m: Rio Gallegos, Argentina
9.6m: St. Helier, Channel Islands
9.2m: Cook Inlet, Alaska, USA