The Dragon´s Eye Stone Mine, Lancashire, UK

“You go through a window in the floor. You have to crawl through and there’s a slope going down. I think it used to be a mine.

“When you get down there it’s a load of caverns and caves. We actually missed the dragon’s eye at first.

“It’s created by a clever camera angle and lighting to get it to look like that. You have to light it up and stand in a certain position.”