The Fourth Ring of Furon is a Furon settlement that orbits the planet Furon. The Fourth Ring serves as a leisure resort and vacationer's paradise. It consists of 6 main areas: The Funky Town artificial Human habitat, the Cloning Industrial Island, the Humania Amusement Park, the Resort Condominiums, the Emperor's Summer Palace, the Outer Rim, and the Furon Underground, both of which consist of several large asteroids. The Furons here aren't the real ones though, they were specifically cloned there for the purpose of vacationing, even though the real ones are still hard at work on Furon. The Furons there only spend a few days on the Fourth Ring, and then once their vacation time is over, they're disintegrated. The Fourth Ring is centered in a small field of asteroids. Many of these asteroids are covered with large blue plants and crystals, strange vents that spew a strange green gas, and many have tiny streams of green ooze running across them. The Furons use the asteroids as parks, and places to build storage buildings and other things.
- Funky Town - A large bio dome habitat for keeping humans that Crypto has abducted over the years. This habitat is used for the viewing pleasure of Furons interested in how humans live. It was once thought to be a portal to and from earth by fans, but only until they actually reached the Fourth Ring did they realize that it was actually a bio-dome for previously abducted humans.
- Cloning Industrial Island - The industrial district of the Fourth Ring, where cloning procedures take place.
- The Humania Amusement Park - A Furon amusement park, filled with carnival games, such as Huminko, Pinball, and Human Darts.
- Condominiums - Consists of 4 platforms with several buildings, which houses the vacationer's rooms.
- Emperor's Summer Palace - A Highly restricted platform which houses the Emperor's Palace. The Palace's Red Nexo Guards will attack anyone whom approaches, unless they are a worker drone, and Furon laser turrets will fire upon any ship that gets too close.
- Outer Rim - A massive asteroid cluster surrounding the Fourth Ring. This area is extremely remote, but does have 2 landing zones, and a small Nexo Base can be located in one of the asteroids during an Odd Job. In another Odd Job, a Nexo Training Ground is located in this area.
- Furon Underground - The area underneath the city, made up of asteroids. This can be considered the "shady" part of the city, and can go very far down. If someone were to fall below the Underground, they would be lost to the void of space.