Sathar

"When Khal Mengo's son, Khal Moro, laid waste to the Waterfall City of Sathar, renaming it "The Place of Wailing Children", the Tall Men finally realized their peril."

- Jorah Mormont

Sathar was the Waterfall City of the Kingdom of Sarnor.

History
Sathal was laid waste to by a Dothraki horde led by Khal Moro. Following its destruction, Moro renamed it "The Place of Wailing Children". This caused the Sarnori to realize how big of a threat the Dothraki were and rally behind the High King Mazor Alexi.

In the books
In the A Song of Ice and Fire novels, Sathar bordered the central Dothraki Sea. In the period in which the novels is set, the ruins of the city of are known as Yalli Qamayi, "The Place of Wailing Children".

Daenerys Targaryen travels north of the city whilst Khal Drogo's khalasar makes its journey from Pentos to Vaes Dothrak.