Pyramid of Hazkar
From A Wiki of Ice and Fire
A Dance with Dragons
After being unleashed with his brother on the city, the pyramid was attacked by Rhaegal and Viserion. Rhaegal attempted to make his lair atop the pyramid of Hazkar, he killed the slavers who were foolish enough to object. It has become a smoking ruin that eventually collapsed in on itself, with many of the ancient line of Hazkar lying dead, buried under its now blackened stones  Rhaegal ends up making his lair atop the pyramid of Yherizan
Shortly after Prince Quentyn Martell died in Dany's bed Ser Barristan stood on the highest step of the Great Pyramid where he notices that whips of smoke still rise from the smouldering ruin of the pyramid.