So you would have been living in the Pfälzerwald. An old friend of mine lives in Kindenheim, which is about 25 miles to the north, at the northern terminus of the Weinstrasse (Wine Highway), which is located just east of the mountains and runs down to the French border.
The back fence of the post chapel was the international border, but there was a big hole in it. We used to crawl through it so that the next day, when our teacher asked us what we did over the weekend, we could tell her that we'd been to France.