Air N' Water
Air N' Water is Air Crash, an special stage in Air Crash only accessible from a portal in the secret warp room. It is level 7 in Crash Bandicoot 2: Cortex Strikes Back. You can get to the secret warp room with the special stage for Air Crash from Bear Down. When you reach the end of Bear Down, don't use the ray of light to exit. When you hope off the polar bear you should see there are platforms on the water's surface. Stepping on the white platform in the middle will instantly warp you to the secret warp room with the special Air Crash stage, but not that the small purple platforms sink after a while so jump quick to the next one.