Rook Island: home of caves, dilapidated buildings, caves, bars that can withstand a barrage of RPG fire directed at them by an angry me after a particularly unsuccessful poker game, caves, temples and caves. Far Cry 3's island is beautiful, to be sure, but it's not the most wildly varied of environments. This collection of early concept art shows a much wider selection of themes and locations. There's the familiar rusted shipwrecks and wooden shacks, but also ideas that would mark a very different tone than the game's final setting.
Theme parks, a golf course, yachts, luxury resorts. Much of the art suggests Rook was once planned to be a tourist retreat for the wealthy. All of the locations are in some state of disrepair, presumably hastily abandoned after the threat of Vaas or whatever alternative antagonist was being considered at the time.
The pictures were made by concept art specialists West Studio. I've embedded some of the best below, but you can see the full collection