From Sonic Retro
Ruin Wood is the second stage in Tails' Skypatrol. The level first starts in a cave, which seems to use elements from Mystic Cave Zone's design. You then come out in an area with ruins. Watch out for the Carronade cannons. Badniks are Balloon Guns, Hanerutons, Bound Heads, Minokichis, Gons and Capture Berries. The boss in this zone is the Bearenger. The Area Bonus gives you 10,000 points.
This is the only level in the game to have 2 songs (not including the boss theme): one for inside the 'ruin' (the cave part), and one for the 'wood'.