Shrine Island

Shrine Island is a small island that floats off the "coast" of Angel Island, which it was originally apart of. As its name suggests, it is the site of the Master Emerald shrine, and thus a typical gathering place of Knuckles the Echidna and the Chaotix.

History
Shrine Island was created when Super Sonic battled the fourth Enerjak, who was in fact a brainwashed Knuckles the Echidna. Their battle caused an explosion that ripped the Master Emerald Shrine and the floor of the Chaos Chamber from beneath Angel Island's surface, resulting in the creation of a small island that was held aloft by the Emerald just like Angel Island, which continued to float despite Shrine Island's separation from it. Shrine Island was also the site of a brief skirmish between Dr. Finitevus and Knuckles' allies, who were attempting to free Knuckles from Dr. Finitevus's hex. Guardian Locke sacrificed his life to accomplish the task, and Finitevus escaped Shrine Island after Knuckles attacked him seeking to punish him for his crimes.(StH: #184)