Purification Facility

The Purification Facility is a large, run down building that resides within a dense jungle. It acts as a main setting in Season 4 of Sandguardians, though it first appears in Season 3.

Overview
The facility is located behind the Guardian outpost DotCom and can be accessed by moving through a sewage pipe. The Guardians used the pipe as an escape route to the jungle, as shown in the episode Priorities. The jungle itself is very large and dense, where one can easily get lost.

In Season 3, Mickey and Bart tell Miller and Claire about the facility and how to escape to it, which Legend overhears and eventually does. When Seal later escapes DotCom by going through the pipe he encounters Legend on the other side. The Reds then also escape through the pipe with Nash and journey through the jungle to avoid ONC hunters.

Trivia

 * The facility is represented by the Halo 3 map "Ghost Town".