|Hills that yell a lot|
|Location||Hills that yell a lot|
|First appearance||"The Rock of Sages"|
The hills that yell a lot are a location featured in the episode, "The Rock of Sages," and a part of the seven corners. Happy has to overcome yelling hills to gain the yellow gem, a component of the Rock of Sages. He does this by getting them to harmonize with him.
The green hills' yells are powerful enough to blow a person away when the yellow gem is intruded upon. However, the gem can be achieved if the hills are singing happily.