Vaes Qosar
From A Wiki of Ice and Fire
Vaes Qosar is a ruined Qartheen city located in Essos, east of Qarkash and northwest of Qarth, in the southeastern portion of the red waste.[1][2] It was originally called Qolahn, but it is now known by its Dothraki language name, Vaes Qosar, meaning City of Spiders, after its destruction by the Dothraki during the Century of Blood.[3]