The stone wall, which is 1.8 meters tall and 7 meters wide and runs east to west, is believed to have been a boundary that divided the central part of the castle and warriors’ residences.

Watch: The BBC's Jean Mackenzie examines the wall near the runway at the South Korea plane crash site Aviation experts have raised questions about an "unusual" concrete wall near the runway and ...

Aviation experts have said airport authorities in South Korea should face serious questions over the concrete wall that a plane collided with killing 179 people. Leading air safety expert David ...