Green Hill Zone

Green Hill Zone (also known as Green Hill) is an area on South Island and is the first level in the game Sonic the Hedgehog. Throughout the Sonic the Hedgehog series it has made numerous appearances in many games, including Sonic Adventure 2, Sonic Battle, Sonic Chronicles: The Dark Brotherhood and Sonic Generations. In other games in the series, various levels including Emerald Hill Zone from Sonic the Hedgehog 2 and Seaside Hill from Sonic Heroes are based off Green Hill Zone, having the same kind of green grass and checkered soil. Green Hill Zone appears in Mario & Sonic at the Sochi 2014 Olympic Winter Games as a Dream Event location.

Mario & Sonic at the Sochi 2014 Olympic Winter Games
Green Hill Zone appears as the setting for Hole-In-One Curling in Mario & Sonic at the Sochi 2014 Olympic Winter Games, more closely resembling its appearance in Sonic Generations, though the default music track is Splash Hill Zone from Sonic the Hedgehog 4: Episode I.

Mario & Sonic at the Olympic Games
In the "Gallery" section of the Wii version of Mario & Sonic at the Olympic Games, one of the two backgrounds for the Count Master mini-game is Green Hill Zone; it appears in the second, fourth and final levels. The music of the Green Hill Zone can optionally be heard in the game, once it has been unlocked.

Mario & Sonic at the Olympic Winter Games
A background based on the Green Hill Zone appears in Dream Figure Skating in the Wii version of Mario & Sonic at the Olympic Winter Games for the first segment of the Sonic's World routine.