Next to the famous odd rock formation called "Pico Peito do Pombo" it can be seen in front, a second peak where the cache can be found.
The cache is hidden just below the zummit of the second pick in the middle of the rocks:
it is a small container with a log, a pen and some surprise gifts, only 10 (no food, for sure).
I don't wanted to make it difficult to find, if you make it to the peak, you deserve to find the Cache.
For instructions to reach the peak, you can find on internet many maps, guide and even you can hire a person to guide you in Sana. If you are familiar with hiking on mountains this is not too difficult I went with a couple of friends (including a girl first time hiking) and we make it with no problem on one half day.
Here some pictures of our Hike: https://flic.kr/s/aHsjZP6xVE