|This location exists primarily or exclusively within the Post-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Underground Zone is a Zone that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is located mostly underground and consists of ground and lava, located on South Island.
Sonic the Hedgehog engaged the Egg Antlion and the members of the Super Special Sonic Search & Smash Squad in the Underground Zone in order to rescue Breezie the Hedgehog, whom he believed to be their hostage.