The Tombs of the Ancient Kings

The Tombs of the Ancient Kings were in Calormen on the far side of the desert, outside the city of Tashbaan.

Shasta, Bree, Aravis and Hwin met there after going through Tashbaan.

Summary
The Tombs of the Ancient Kings were as the name implies: the tombs where the Calormene kings of old were buried.

They looked like twelve "big bee hives", according to Calormene fables, and were claimed to be haunted by ghouls. However, Shasta slept there for a night unharmed, though the myth led him to be frightened by a cat (which was actually Aslan) during the night while he was there.