The cache is a squared transparent tupperware with a red cover. It currently only contains the logbook and a pen but soon (in about two weeks or so), when I get back there, I'll put some cool things inside.
You can get to the cache by car or by foot - your call, of course. If the area is too swamped (when it rains) then walk. If you go by car, I recommend one with a high suspension (I wouldn't risk my Honda Civic, me and my brother used the Renault 9 that we usually drive inside the farm). Of course, a jeep would be ideal.
Leave the main asphalt road at
You can have a drink right there if you want. The place is called "Vendinha".
When you get to about 800m from the cache, DON'T follow the arrow. Neither the one in your GPS, neither the other. Now, when you start going down, most probably you'll see dogs, and maybe some kids. There's no need to stop. Just act normal. Maintain a constant speed and the dogs won't be a problem. Also try not to run over any chicken. Pass by the right side of the house and keep going down. Now follow the arrow.
After you find the cache you can call the number that I put in the logbook. If I'm at the farm at the time, maybe we can meet.
If you want to refresh, here are the coordinates for three barrages inside the farm. For two of them the road is blocked by a gate so you'll have to walk.
Vale do Rato: 37º51,00000'N 07º31,52800'W
Sobrosas: 37º50,97900'N 07º31,97100'W
Pilão: 37º50,96100'N 07º31,39300'W
This is one of the highest spots on the propery, from where you can see almost everything: 37º51,51000'N 07º31,95600'W
To have a good dinner go to 37º53,20200'N 07º33,47500'W If you have any difficulty ask for Dona Odete's restaurant.