Lost City is the 12th world in Plants vs. Zombies 2. The timeline of this world is unknown; it appears to be set in early Mesoamerica, but it seems to take place during the early 20th century, as the city seems to have been decaying for a long time and the zombies appear to be from a more modern era of exploration, and there are planes which are invented in 1903. So the timeline is set to be after that. This world is based on the lost world of Maya. The Lost City here is based on an ancient city found in a rainforest in Guatemala. The temple, which is in this world's icon, is a form of a Tikal Temple. The main gimmick of this world is the Gold Tiles. When a plant is placed on a Gold Tile, it will immediately give the player 50 sun, and then produce another 50 sun every 20 seconds until eaten, crushed, or moved by the zombies. Replanting a plant on a Gold Tile generates initial sun. Nothing special happens when the player uses Plant Food on a plant located on a Gold Tile.
The Zombies that you can see in this world (My Take): Adventurer Zombie Conehead Adventurer Zombie Buckethead Adventurer Zombie Templehead Zombie Flag Adventurer Zombie Rally Adventurer Zombie Lost Pilot Zombie Excavator Zombie Parasol Zombie Lost City Imp Zombie Bug Zombie Porter Gargantuar Imp Porter Relic Hunter Zombie Turquoise Skull Zombie Lost Explorer Zombie Lost Doctor Zombie Lost Guide Zombie Photographer Zombie Zombot Aerostatic Gondola