Tree Tops

It's a relatively short level, as if that makes up for anything in it. It's very easy to fall off (being a Floating Continent-type level), has some mildly annoying enemies (the large ones have a somewhat wide-range kick, and the smaller ones throw banana bunch-like projectiles without any sound cues), and to get everything, you're gonna need to pull off some Guide Dang It!-y Super Charge maneuvers. Route is outlined here. Spyro even lampshades this by complaining to the dragon you find doing this route that he "could have found an easier spot to get stuck."

Example of:
That One Level