Wing Mario Over the Rainbow

Winged Mario Over the Rainbow is one of three secret levels in Super Mario 64, where Mario uses the Wing Cap to collect eight Red Coins. The entrance is on the left side of the third floor near Tick-Tock Clock. The level contains two platforms with a cannon on each, and four solid clouds. Two of the clouds are transparent and Mario can fly strait through them.

There are six wing cap ! Blocks strategically placed around the level so that running out shouldn't be a problem.