Osgiliath Basin (オズギリアス盆地), also known as the Forbidden Land (禁忌の地), is a depression in the central north of Erebonia.
The lamp-shaped artifact Eternal Kandelaar, capable of introducing higher elementals to a specific area, was found during an excavation in Osgiliath Basin. It was immediately brought to the Imperial Museum in the Leica District, Heimdallr.
- The name is a reference to a city in Lord of The Rings. Since LOTR isn't as popular in Japan as it is in the West, Falcom didn't get sued for copyright infringement.
- Beryl calls Osgiliath Basin her 'origin'.