You can arrive either by foot or car at N 044° 00.183' E 007°19.873'. This spot is next to hiking route GR52A (50-100 m from the actual trail, at this spot a dead end road).
Goal of the cache is to find the outer parts of the bunker in the area. The inside of the bunker, which is no longer accessible, is quite a complex. So don't be surprised you may have to walk a bit further than expected. Next to the main entrance you can find three outer parts of this bunker (they inlcude turrets).
Send me the location of all three parts and/or some pictures of the parts and you will be rewarded with some pictures from the inside of this bunker (10 pics, 800 kB)
BONUS for the adventurer:
There is another exit / entrance close to [N 44° 00.163' E 007° 19.739']. It is on the upper side just off the road. It is a small corridor through which you have to crawl and this will give entrance to the whole of the complex. Unfortunately I cannot tell you whether this corridor has been closed too. Please inform me of the status of this corridor
Several tips for maximum fun in case of open corridor:
Don't go alone. You will be too scared anyway.
Bring a good torch per person. Day or night, it doesn't matter. It will be dark 24/7.
Bring a camera with good flashlight for quite some souvenirs.
Be a good geocacher, don't start big rumours about this one. This shouldn't become a touristic attraction or it will definitely be closed.
Don't worry after you read this. I walked there with little children. You do not end up in a Scooby Doo story.