Atlantis is a zone added in the Atlantis update on June 22, 2018. It requires 5 Rebirths to unlock. It was built by Nosniy.
The third densest (Sand)Stone in the game (containing 82,500 units) can be found here. Scuba Sam gives out quests here.
Atlantis is based on the legendary myth of the sunken city of Atlantis. It has an underwater theme, and fish, coral, seaweed, bubbles and ancient ruins can be seen. Some of the coral glows at night, serving as lamps. The shop is a sunken ship and the sell area is a treasure chest filled with gold. There is a statue of a Bacon Hair wielding a trident. On the base of the statue is a plaque that reads "The Lost City of Bacon Hairs."