Winx Club Forever
The City of Trees is a place seen in Season 3.
Like its name suggests, it is built high in the trees. Since technology is forbidden in the City of Trees, giant leaves are used as transport. Since the winds coming from the mountains are opposed to the direction the leaves must take to reach the city, the leaves must move very quickly, which can even cause a fairy to have dizziness.
The Winx arrive at Flora's home planet, Linphea. They meet Flora's little sister, Miele and travel to the Sage of Linphea. They must travel to the City of Trees, which Flora reveals that technology is forbidden in her realm. The Winx plus Miele ride leaves to travel up but encounter Stormy's acts. Being able to defeat Stormy's attack, the Winx continue on their journey.