Millions of migrants have crossed illegally from Mexico into the United States. Their experience could hardly be more real. But now at a controversial theme park in Mexico, tourists can pretend to be an illegal migrant. Torch, check. Heavy boots, check. Willingness to hide under bushes, check. Ability to see in the dark, an advantage. Preparation for what, you might think? A hike across Dartmoor? Try a night out in a theme park. But when I say theme park, do not think Alton Towers or Disneyland. Think, instead, illegal migrants. Because now you can pretend to be an illegal migrant...