A Vale in its simplest form is nothing more complicated than a doorway, on one side you have life and on the other you have death.
It is believed by many that this literal doorway to the world of the dead only becomes accessible when the Vale is at its thinnest during the time of Samhain also known as the Day of the Dead or All Hallows Eve.
During Samhain, people traditionally wear masks so they are not recognised by spirits that cross the Vale back over into the living world looking to take their vengeance upon the living.
The Vale cannot be seen nor entered until your spirit has left your body, only those who have experienced a NDE (Near Death Experience) have actually been inside the Vale and have returned.