When I first saw him, I was puzzled and wondered why he was sitting on the steps of the Maremagnum.

After all, he's in Barcelona, and when in Barcelona you walk, eat, shop, rest, and then start again until you drop from exhaustion.

But he was alone, and I liked his ruggedness, quiet demeanor, intense concentration and I wanted to take a photo for its perspective and composition.

For a few minutes, look before zooming in on the photo. Can you figure out what he's working on?

Did you guess Sudoku?! I would have never guessed.