“Hey gringo! Do you know the road to El Dorado?”
Here is an in-joke that only three people will get. I don’t know if any of those people read this page. I would explain the joke, but it would only fail to be funny for everybody else. Any person who can guess the origins of the joke with complete accuracy (the word ‘guess’ excludes the aforementioned three or others with prior knowledge) will win a free boat ride for three.
NB: This link has nothing at all to do with the joke. I just really like that song. The joke is solely photo-related.