Crash Nitro Kart (Adventure Mode) - Barin Races and Champion

The 2nd world in the game is mainly focused on arctic environments, with one underwater cave track. I mean, ice is frozen water so I suppose it fits.
Meteor Gorge: This track is really easy to get a ton of boosts on, shortcuts notwithstanding. The faster paced, frantic nature of it makes gliding through it a blast.
Barin Ruins: Quite a unique combo. Ice cave with ancient golems and shit. I like it. That being said, I hate that shortcut near the end. I can almost never seem to get it without the help of a boost powerup. This'd be an issue in the CNK challenge, but....
Deep Sea Driving: This track is like Roo's Tubes in concept, but in execution I like this track far more with its jumps, aesthetics, and anti-gravity tube sections filled with sharp blades. The boss version of this track makes the blades stationary, which I suppose is an interesting dynamic. Granted the blades as they typically are combined with the power-up spam would make it annoying as hell for newer players.