Translation of serving in Spanish

Hamburg is a very beautiful city and i have a friend studying in that university. I hope you can enjoy your live and studying there. I have been teaching in a language school for a while. But in one month I am going to be in Hanover again.
After ten minutes and after drinking a bottle of water we returned to our place. It was already three in the morning. We were unhappy to miss a great party, but our physical conditions were bad.
The next day we had the feeling that the worst of our altitude thickness was over and decided to take the local bus to the Sacred Valley, a key area of settlement to the Incas.