- For the international version of the level, see Lost City - Day 20.
- For the level after the v1.8 update, see Lost City - Day 20 (Chinese version).
Lost City - Day 20 was the 20th level of Lost City in the Chinese version of Plants vs. Zombies 2. Turquoise Skull Zombie was introduced here. The lawn had Gold Tiles in the shape of the letter "M," which was placed exactly in the middle of the lawn. After completing this level, the player received a money bag.
- * A gate can be unlocked with a key after completing this level
^ Conjectural name