This is the Ancient Grove from the Spyro series.
The appearance is obviously that of some evil-looking grove. You can't see it from the picture(I couldn't find an image of the actual location in the game), but there will be several aerial platforms. There's a small puddle of purple water(eww) in the center of the arena. While this puddle is shallow enough for any character to stand in, the water itself is poisonous. Standing in it is hazardous to your health.