Little Garden

The Miniature Garden is the world where Izayoi Sakamaki, Asuka Kudō, and Yō Kasukabe enter when Black Rabbit summons them there. It's also known as the "Little Garden".

Background
The has 7 layers or gates that make up its world. As stated from Episode 2 - Seems Like a Crazy Loli Clad in Japanese Clothing?, Black Rabbit and Shiroyasha explain that the closer one lives to the center or gate number 1, the stronger they are. The red circle indicates the part closest to the center of the world.

Known Communities
The list below lists all the communities that has been mentioned in the anime.
 * No Name Community  - 7-Digit #2105380
 * Fores Garo Community - Disbanded
 * Thousand Eyes Community - 4-Digit # 3345
 * Perseus Communit - Assumed to be 4-Digits or less
 * TBA
 * TBA
 * TBA