Also known as the Floating Island, this land mass actually hovers several hundred meters over the ocean, thanks to the power of the Master Emerald housed within. That is, if not for the shattering of the Master Emerald into 20 pieces. Angel Island now floats upon the ocean, awaiting the return of its power source.

The Death Egg, the Sky Armada and Final Fortress, the Egg Carrier 2... all of Eggman's previous installations have drifted to this point on the map, and Eggman has built a massive iron fortress on top of the resulting island. Rumors persist that a metal spire runs from the underside of the island to the center of the earth itself...

A sprawling GUN facility located on a jungle island, this base is used as a prison for some of GUN's most wanted enemies. This is also the launch base for much of GUN's aerial and naval fleet. The GUN base was recently completely destroyed by a nuclear blast set off by an awakened ARK experiment, with many awakened experiments vying to reach the surface.

Lying far off the coast of Westopolis, this chain of islands sports a magnificent marvel of engineering after which the islands were named: Adabat City, the city of the waves. The main island is mostly jungle, however, and is mostly uninhabited. Adabat City still serves as a very important international port.

A city under the sea, not so much built as grown out of coral. It is a safe haven for those who have given up their villainous ways, but the locals take harshly to anyone who commits a crime.