The battery of San Juan is an old fortification which was started to be built in 1898. At the end of the 1950s it was only used as a storehouse before it was abandoned a few years later. Today it is used as a playground or a setting for photoshootings where you can see jogger and muggles with dogs. And now there is a geocache hidden also ...
To find this geocache, you first have to find six of the photos below at six different positions. Go to the first stage and look around. Which of the pictures is nearby? Find it and you have the value for A. Then go on to the second stage and so on.
Finally you can complete the final coordinates with the found values:
B = 8