Wind Crests are stone tablets that can be found throughout The Minish Cap. Pressing the A button activates them, leaving a mark on the ground. Once the Ocarina of Wind is acquired, Link can use it to call Zeffa, and the bird will carry Link to a desired Wind Crest.
Location: Veil Falls
Required Items: None- Once you climb the large wall in Veil Falls the Wind Crest is just to your left.