The cache was installed long time ago but in the meantime the owner lost interest of maintaining it thus I adopted it on geocaching.hu site. I tried to initiate the same procedure on geocaching.com, however I haven't got answer any more. After the cache was archived for this reason, I could renew the listing and add my own description.
During the years of socialism, Hungarian leaders defended us well against "danger" of the western civilization. The comrades kept us "cozy and warm" under very safe conditions... This old deserted rocket defense base is one of numerous examples. When we were young there were soldiers, guards and the whole area was strictly prohibited for other persons. Nowadays you can easily roam through the base, meeting interesting rocket-carrier garages, remnants of canteens and ruins of different other buildings.
The site can be easiest approached from Erd. Coming from Budapest, turn down from the M7 highway at Erd's output. Leaving the highway, turn left on the main road and go straight. You'll reach a bus turnaround, where you have to turn right. Later the road turns left and go through a forest (it's a bit long path, about 2 km). Don't go off the concrete road! Finally the road turns into a dirty one and that's the sign that you reached the base.
Finally I would like to add impressions of the day when I found the cache. I approached it from the other side, from the village of Biatorbagy. The reason was that the military base is 'sandwiched' into two other nearby caches (http://www.geocaching.hu/caches.geo?id=676 and http://www.geocaching.hu/caches.geo?id=631) unfortunately neither of them is listed on .com site but both well worth of visit.
At first I found the GCSzla (the first of the above two) and enjoying the view towards the next point, it didn't not seem too difficult to go there. I went down through the forest on a not too steep slope and so far the walk was any easy one. Reaching the bottom, however, the path upwards was terribly steep and I could proceed only thanks to grasping the small trees along the path. On a rainy day it would have been absolutely hopeless to reach the top from this direction.
As far as the cache itself is concerned this one was the hardest to find for me. After about a half an hour of unsuccessful search I almost gave it up but finally I had to admit that the idea was perfect. To tell the truth, here you don't have neither a nice view nor cleanness of the nature only the cache-hunt is exciting.