Quindecim.

The Gate to Anarchy as well as a posh bar. Decim is the gatekeeper here. Sebastian works with him frequently.

The Citadel.

A valley-bound citadel that provides housing for many headmates. Rooms

The Magic Shop.

A shop owned by Lysandre and Katsuki where they live alongside Julian and sometimes Issei and Tooru.

Scepter 4.

Base of operations for the system's Protectors. Reisi and Saruhiko live here.

Camp Campbell.

Campgrounds in the woods where several headmates reside. David keeps things running here. Cabins

Lake Ukiyo.

The forest surrounding this lake is in a perpetual autumn. The lake feeds into a river that leads to the ocean.

The Ocean.

The ocean

Uroko's Shrine.

Located in the ocean. This is where Uroko and Isaki live.

The Sanctuary.

A font of positive energy that serves to protect the innerworld. Mikleo, Lunarre, and Lucky live here.

The Underneath.

A macabre district that attracts those who are a little rougher around the edges, so to speak.

Soul City.

A cityscape within The Underneath that provides all manner of entertainment.

The Rowdy Raven.

A tavern/pub located in The Underneath.

Bar HOMRA.

Yet another bar in The Underneath. Mikoto and Eric live upstairs.

Hazbin Hotel.

The Happy Hazbin Hotel in The Underneath that provides housing for many headmates. Rooms

Outglut.

Small Alternian subgrub home to most of the system's alien residents. Hives

The Arena.

A dedicated space for training/sparring that changes based on the need.

The Moongrove.

An enchanted forest that surrounds the innerworld, seemingly endless and easy to get lost in.

The Soulspring.

A wellspring of spiritual energy that serves as the heart of the system. Gates to our sisasystems are found here.