Down on the ground, when we drive close up to these green "castles," we are in for a bigger surprise: their "walls" are remarkably high--a full 15 meters or more, as tall as a five-storey building.
真正身臨其境，開車來到這綠色「城牆」下，才驚覺：這「牆」還真高啊，足足有十五公呎左右，相當於五層樓了。