The Grand Line, especially its latter half, called the New World, is considered to be the most dangerous place in One Piece. Filled with abnormal weather, dangerous monsters, and deadly pirates, when sailing in these locations, only the toughest can survive. Even the Straw Hats, a formidable pirate crew, needed two years of training before they could enter One Pieces New World without any substantial risks.
Arabic
French
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek