The Great Wall is the 5th Epic World in Plants vs. Zombies 2 with 25 Levels. Its setting was the Great Wall of China.
The Plants that you can obtained in this world (My Take): Venus Flytrap: Day 1 Popcorn-pult: Day 7 Ball Cactus: Day 12 Frisbee Shooter: Day 19 Melon Slice-pult: Day 23 Clivia: 15 Seed Packets