First Iron Throne Found in br 'Game of Thrones' Challenge In an effort to br promote the final br season of the hit show, HBO launched br a #ForTheThrone campaign. The latest part of that campaign was a challenge for br fans to find six Iron Thrones hidden around the world. Video clues were given out as to br where the thrones might be located. Just days after the announcement of the challenge, the first throne has been found in Gloucestershire, England. The saavy hunters received a br custom crown as a reward. The second and third thrones appear br to be in much different climates.