Arl Dumat – a volcano between the Hunterhorn Mountains and Gamordan Peaks.

Lake Luthias – a small lake south of Lake Calenhad.

Lake Celestine – in the Heartlands of Orlais.

Lake Calenhad – in Ferelden, also the largest in Thedas.

Shining Sea – western part of the Waking Sea.

Waking Sea – between Ferelden, Orlais, and the Free Marches.

Venefication Sea – between Rivain and Par Vollen, including the Northern Passage leading to the Amaranthine Ocean.

Sundered Sea – on the southwestern edge of Orlais.

Nocen Sea – north of the Tevinter Imperium, including the Ventosus Straits.

The Frozen Seas – southeast of Ferelden.

Colean Sea – between the Anderfels and Seheron.

Buried Sea – located in the Uncharted Abyss beneath the Deep Roads accessible via the Bastion of the Pure.

Boeric Ocean – in the north, surrounding Par Vollen and the Seheron archipelago.

Tevinter Imperium – a nation in northern Thedas.

Rivain – a kingdom in northeastern Thedas.

Par Vollen – an island in northeastern Thedas controlled by the Qunari.

Orlais – an empire in southwestern Thedas.

Free Marches – a confederation of city-states in eastern Thedas.

Ferelden – a kingdom in southeastern Thedas.

Anderfels – a kingdom in northwestern Thedas.

High resolution map of Thedas from Dragon Age: Tevinter Nights Surface High resolution map of Thedas from Dragon Age: Inquisition

Dragon age map of thedas