Villain's Vale

Villain's Vale is an place mentioned in Kingdom Hearts II.

In Kingdom Hearts II, if Sora uses the Reaction command on the left balcony in the belfry at the Radiant Garden, the resulting text says that he can see the "Villain's Vale, where Maleficent once resided." From the text, one may presume that the castle seen in the distance is Hollow Bastion, along with the Rising Falls. Therefore, collectively the area may be known as Villain's Vale. Arguably, Hollow Bastion could be the castle where Space Paranoids is found, and the Villain's Vale would be the castle seen upside-down when viewing the world in either Kingdom Hearts or Kingdom Hearts II.

It should be noted that this is the only time in any of the games in which the name is mentioned.