A snowy terrain. The path resembles a DNA. We knew that a DNA Track had already exists in BTD4, but in this track, tunnels have added to hide some paths that's why this track makes four O's. There's one path for the bloons to pass, there are 7 circles (4 shown, 3 hidden), and 14 U-turns all in all (8 shown, 6 hidden). No water.