In Wutai, there is a restaurant called Turtle's Paradise that is holding a giveaway to anyone who sees all of their posters in the world.
The rewards for looking at all posters and then visiting the restaurant are:
Below are the locations of the posters.
Turtle's Paradise Poster #1:
The first poster is located in Sector 5 Slums. In the house to the right of the item shop, upstairs in the boy's room.
Turtle's Paradise Poster #2:
The second poster is in the Shinra HQ. On the first floor, at the back is a notice board with the poster on it.
Turtle's Paradise Poster #3:
The third poster is in the Gold Saucer. In Ghost Square is a hotel; in the lobby is the poster.
Turtle's Paradise Poster #4:
The fourth poster is in Cosmo Canyon. The weapon shop has a poster on the beam by the stairs.
Turtle's Paradise Poster #5:
The fifth poster is also in Cosmo Canyon. The Inn has a poster outside the bedroom. Head upstairs in the inn and head left to find it.
Turtle's Paradise Poster #6:
The sixth and final poster is in Wutai. In Yuffie's underground base is the last poster, on the wall outside the room where she traps you.
Finally, head to Turtle's Paradise and read the poster outside to flag the quest as active, then enter the restaurant and speak to the owner behind the bar to receive your prizes.
