Thanks for the hints, I read them just in time and took a bus from Sintra to Cabo da Roca. Too bad the caches there weren't on my geocaching app and for some reason it would not download them on site. So the great place I saw but could not log anything there, not even the earthcache since I didn't remember what to do. Anyway, a site well worth visiting even without logging the caches
Will look into the rest of your hints on the evening cache trips starting tomorrow
-rixu