Vale of Denaria

"The ransom was supposed to be delivered to the Vale of Denaria. If they're holding Gwen anywhere, it has to be there."

- Arthur to Merlin

The Vale of Denaria is a vale located near the Camelot/Mercian border.

History
When Hengist kidnapped Guinevere (who he had been led to believe was the Lady Morgana), he left instructions that her ransom was to be delivered to the Vale of Denaria (Lancelot and Guinevere).