That's Nessie. Obviously: she has a tunnel from Loch Ness to China. And when people at Loch Ness investigate too much, it gets too hectic for her and she takes off to China. Why didn't the scientists notice that? Simple: Nessie has a cover over the tunnel there, probably a lock system. Otherwise all the water would drain away to China - it's logical, right?
At kniebes|net you can find the original article.