Thelma Okocha had never thought about going to Northern Ireland. Yet here she was, standing on a rocky strap of mossy shore, in the rain. For her, this is hallowed ground.
"Euron Greyjoy almost killed Jaime Lannister here," says Okocha, a 29-year-old business intelligence developer who works in New York. Then she motions to a nearby cave where her tour group is huddled. "And that's where Melisandre gave birth to that demon shadow that killed Renly Baratheon," she says, "I can't believe I'm here."