Translation of Gewissheit

There we saw a lot of these beautiful trees which I had heard about when I was back in Germany. We visited the folliage and saw some amazing lakes in the northern part of the state, different from the rest.
I just came back from Switzerland. Please give me a week to read the material you sent me. How was your time in Switzerland? Rani already asked me yesterday. Tell me when and where. I'll keep Tuesday free.
We arrived without any more power back in the village of Sapa and went for dinner right away. We went to bed early, because of the physical exercise and because we did not sleep well a night earlier.