When a series has been running as long as One Piece, it's bound to have a treasure trove of memorable moments ready to be plundered. What sets One Piece apart from most other long-running anime is consistency. Looking back throughout the years and its numerous arcs, there are iconic moments in every single canon story arc – from Luffy setting Zoro free to his epic showdown against Kaido.
Source：https://www.cbr.com/one-piece-arc-higlights/
