|This location exists primarily within the Adventures of Sonic the Hedgehog continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
On the surface, Marble Zone is a barren and yellow rock-like expanse, filled with active volcano-like geysers, a few cliffs and purple rock formations in the horizon. The underground of the Marble Zone contains an elaborate cavern system and is rich with precious metals and gemstones, such as gold, jewels and diamondius, making it perfect for mining.
At some point, Spelunk set up a claim in the Marble Zone, isolating himself in the area's underground cavers for years to mine for jewels and gold. To safeguard his fortune, Spelunk booby-trapped every tunnel in the Marble Zone.
In the present day, Sonic the Hedgehog and Tails came to the Marble Zone where Scratch and Grounder made them escape into the Marble Zone's caverns. While Scratch and Grounder pursued them, Sonic and Tails stumbled upon Spelunk's treasure. Believed Sonic and Tails were thieves, Spelunk trapped them in a diamondius cage. Meanwhile, Scratch and Grounder returned to the surface with Dr. Robotnik and began digging up Spelunk's cave to both claim the treasure and Sonic, freeing Sonic and Tails in the process. Sonic then saved Spelunk from a boulder, making Spelunk realize Sonic and Tails were good enough. The trio then banded together to escape Spelunk's bobby-trapped tunnels, defeat Robotnik and get the stolen treasure back. Having a change of heart, Spelunk left the Marble Zone to use his treasure to help people.
- This location has the same name as the Zone from the Sega Mega Drive video game Sonic the Hedgehog. However, it looks completely different form how it did in the video game where it was a lush, lava-filled ruin.