Dog-Friendly: No Kid-Friendly: Yes
If you've ever visited the Hotel Del Coronado before and walked along the shoreline, you have probably noticed the immense sand dunes that reside just north of the hotel. These dunes are like their own little land when you're inside. Kids like to create mazes out of them and joggers use them for endurance. What you may not know is that they actually spell out a secret message!
Back in the 80's there was a huge storm that created such a massive buildup of seaweed that the maintenance man in charge of cleaning up the mess didn't know what to do with it all! He finally decided the best way to clear the mess was to hide it by piling sand on top, creating these large mounds. Being a creative type though, he went one step further and had them spell out the word "Coronado".
It was kind of his own personal joke for some time until Google Maps came around in which anyone can now search it for themselves! A bonus tip is that a whale is buried in the letter 'R'!
From the ground it just looks like regular mounds of seaweed and sand: