"I tried to get back through that fountain," Oliver says, huffing a quick laugh. It had been a fool's errand, just like the lake, but at least he'd had a chance to give it more than one try before he gave up. The weather's too cold for any extended trials.

"And I tried to climb the cliffs. Nothing seems to work. It's like you get closer and closer and the horizon seems like it's getting but it doesn't. It's all some kind of optical illusion."