Windy Valley (Sonic X)

The Windy Valley is a location that appears in the Sonic X anime.

Anime
This location is first seen when Sonic and Tails visit it in order to find the Chaos Emerald located in the area. As the name would imply, the area has very strong winds, so much so that Tails was nearly blown away before Sonic caught onto him. Realizing the Emerald to be underground, Sonic uses a ring-powered Spin Dash to dig and retrieve it.

Upon doing so, the Chaos Emerald is stolen by Dr. Eggman, who arrives in his Egg Hornet. Eggman soon attempts to escape, but Sonic confronts him with the intent to regain ownership of the Chaos Emerald. Although initially losing, with the aid of a Ring, Sonic is able to take down the Egg Hornet, which causes the Chaos Emerald Sonic had found and the one Eggman had to fall into the nearby lake. Unbeknownst to Sonic and Tails however, Chaos 2 was inside that lake, and now having obtained two more Emeralds, he'd become Chaos 4.

Chaos 4 uses a windy wave to blow Sonic and Tails away. Sonic's attacks are initially useless, as Chaos 4 simply would submerge underwater in order to avoid the attacks. Chaos 4 goes on to use a tornado to knock Sonic off the lily pad he was standing on, although Sonic is able to land on one of the several other lily pads in the lake. Chaos 4 attempts to attack Sonic with another wind-based attack, but Sonic manages to avoid it and grabs hold of Chaos 4, only to be constantly dunked in and out of the water. As Chaos 4 keeps dunking Sonic, Sonic takes note of the strong winds, and decides to use it to his advantage, building up his speed and taking out Chaos 4.

Despite Sonic winning the fight, Eggman still manages to make it off aboard his Egg Mobile with the 4 Chaos Emeralds.

Gamma later visits this same location in order to rid E-103 Delta of Eggman's status as their master from Delta's data bank. Upon doing so, the bunny trapped inside Delta is released.