Immortal Realm

The Other Realm is an other-dimensional world set aside as a home for witches, mystical beings and other members of the magical community. It has never been properly defined; it seems to have qualities of an alternate earth (having divisions like Earth similar to Canada and the Caribbean islands) possessing seasonal and astronomical cycles and periods but having characteristics outside the regular Laws of Nature. Said to be millions of lightyears away from the Mortal Realm (that is Earth and its Solar System), it is accessed through a portal resembling a small black hole or by mystical teleportation aka Molecular Transference. Agatha Spellings located their portal in the Linen Closet of the Serena House. The portal doesn't seem to be prejudiced to travelers, often transporting mortals to the Other Realm who stumble through it.