You may know this twisted beech tree tunnel as the King's Road in HBO's "Game of Thrones." In fact, it's one of Northern Ireland's most beloved arboreal attractions. The trees were planted by John Stuart in the late 18th century to line the avenue leading up to his Georgian mansion, Gracehill House. Today, Dark Hedges remains a magically impressive sight along Bregagh Road, drawing tourists from around the world. The otherworldly canopied boulevard even comes with its own ghost, the mysterious Grey Lady, who is said to wander through the gnarled trees, vanishing as she passes the last one.