Shangri-La is one of the thirteen network levels in Marathon 2: Durandal.
There is a 2x health charger in the middle of the map, (Shown as a blue circle with a 2x above it on the map to the right) which everyone always fights over.
Interesting Fact[]
If you listen carefully you can hear a loon calling in the background.
Sources[]
Marathon 2: Durandal - Network Level: Shangri-La