Ghoyan Drohe was a Rhoynar city that was destroyed by the dragons of Valyria during the Rhoynish Wars. According to Tyrion Lannister, until the wars the city was "a fair place, green and flowering, a city of canals and fountains."
A Game of Thrones
A Dance with Dragons
Tyrion Lannister meets the crew of the Shy Maid at Ghoyan Drohe. He notes that "the canals were choked with reeds and mud, and pools of stagnant water gave birth to swarms of flies. The broken stones of temples and palaces were sinking back into the earth, and gnarled old willows grew thick along the riverbanks."
Chapters that take place at Ghoyan Drohe
—Tyrion Lannister's thoughts