“It is the obvious which is so difficult to see most of the time. People say ‘It’s as plain as the nose on your face.’ But how much of the nose on your face can you see, unless someone holds a mirror up to you?”
― Isaac Asimov, I, Robot

Pic: Bill E. Lytton, Red Telephone Box, from the series London Tourism, 2012. Created by layering thousands of tourist photos of typical London sites.