Translation of cornerstone in German

Anyway, we knew that we would return there too eat many more soups on our trip. When we left the place there suddenly started intense rain and we had to run for cover in order not get wet.
We had dinner in a Chinese restaurant not far from where we slept, but it was not good at all. We walked home and slept early. The coming morning we were picked up on the backpackers' street.
The same night we went to a great restaurant in town (near the main street). We met a very friendly couple in their fifties from Buenos Aires. They told us many interesting stories about Argentina.