Sand castles

What a great sand castle in progress on the beach!

It must have been Friday morning and we heard this front-end loader on the beach making a racket. What he was doing is making a huge pile of sand near the malecon. We could not figure out for what purpose you want a 10 – 15 foot high pile of sand near the sidewalk until we saw these two guys working on a sandcastle. It is nowhere completed and they have been working on it for a few days already.  I wonder if they sleep near it so it is not disturbed???