Complete - Orbinaut Framework: Green Hill Pack

Sonic Mania - The Cutting Room Floor

Genesis / 32X / SCD - Sonic the Hedgehog - Green Hill Zone Act 2 - The Spriters Resource

Green Hill Zone, Map of the Sonic the Hedgehog video game universe Wiki

Custom Green Hill Sprites [Outdated] by FuzzysArting on DeviantArt

Chronicles' GHZ - Stage, Models, etc WIP thread, Page 3

no i will not shut up about sonic

Sonic The Hedgeblog — In early 'Sonic 1′ screenshots the Green Hill Zone

Sonic The Hedgeblog — Past Green Hill 'Tails & The Music Maker' SEGA

Sonic The Hedgehog Sprite Sheets: Game Boy Advance - Sonic Galaxy.net

S2Beta:Prototype Zones/Emerald Hill - Sonic Retro