The World Tree

The World Tree is an important place in Futari wa Pretty Cure Splash Star. It's the tree that rules over all lives in the Land of Greenery and the Land of Fountains.

It's located in the middle of the land of fountains. Seven fountains are responsable for keeping the World Tree alive. Six of them are located inside the Land of Fountains:

Fountain of Trees

Fountain of Fire

Fountain of Earth

Fountain of Sky

Fountain of Water

Fountain of Gold

The seventh fountain is located inside the Land of Greenery, the Fountain of Sun. To obtain the power from this fountain, the World Tree is connected to the Sky Tree.

Princess Filia is the spirit of the World Tree. Her power is connected to the tree itself. She borrows the power of the spirits to obtain the power to create everything.

The spirits can travel freely between the Land of Fountains and the Land of Greenery using the World Tree or the Sky Tree.

History
When Dark Fall dried the six fountains located inside the Land of Fountains, the World Tree was heavily injured. The Fountain of Sun, the most important fountain of them all, kept the tree alive.

As soon as the fountains were being restored by the Precure, the power was being returned to the tree. Consequently, Princess Filia's power was being restored too.

Saki and Mai discovered the connection between the trees in the last episode. With Goyan's defeat, the World Tree was saved and Princess Filia could return to the Land of Fountains.