Translation of atrocious in German

Anyway, we left, as everybody else was leaving and once outside we understood that most people were just crossing the street in order to enter into this other night club. So did we.
We decided to walk back and explore the city on foot. It was hard to cross the streets as there was an endless flow of motorcycles and bikes. One needed to just enter the street and cross it.
We walked almost every alley in Cusco, stunned by its beauty and ignoring the developing altitude thickness, which resulted in the most horrible night of our lives.