Pyramid of Hazkar
From A Wiki of Ice and Fire
A Dance with Dragons
The pyramid is attacked by Rhaegal and Viserion after they are unleashed upon the city. Rhaegal attempts to make his lair atop the pyramid of Hazkar, killing the slavers who are foolish enough to object. It becomes a smoking ruin that eventually collapses 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 dies in Daenerys Targaryen's bed, Ser Barristan Selmy stands on the highest step of the Great Pyramid where he notices that whips of smoke still rise from the smouldering ruin of the pyramid.