Tarth

Tarth is an island in the Narrow Sea of the south-east coast of Westeros, separated from the mainland by the Straits of Tarth. It is located near the Stormlands and is held by House Tarth, vassals of the Baratheons.

The Tarth castle is called Evenfall Hall. It is the home of Brienne, sometimes called the Maid of Tarth.

In the books
In the Song of Ice and Fire novels, Tarth is said to be a beautiful island. It is called the Isle of Sapphires for the clear blue waters surrounding the island. The island contains mountains, waterfalls, high meadows and shadowed vales.