Episode 102

"Ruins and Lost Ones! Vivi, Comrades, and the Shape of a Country" is the 102nd episode of One Piece anime.

Short Summary
Zoro, Chopper and Luffy manage to get themselves lost, because of Luffy, and stumble across some huge underground ruins which has a Poneglyph.

Trivia

 * This is the first time Poneglyphs are shown in One Piece, but it is considered non-canon as this was a filler episode.
 * Luffy sees a mirage of Crocodile and refers to it as him, despite the fact he's never seen Crocodile before this point.