Translation of attaché in German

Friends, Family and similar relationships you are saying mostly "Du". Young people too. In the city, on the phone, school, at work and in the bank always say "Sie" for now.
We really felt like being in a stupid tourist attraction. The environment was very beautiful but the mass of people would ruin our special moments. Anyway we had one more surprise on the way back.
We had decided to fly to Lima (instead of Buenos Aires, Argentina) and to visit Machu Picchu just a few weeks before leaving Europe.