Translation of nefarious in German

We sat on the balcony and saw that the hotel had even a pool on the roof top but I did not have the courage to jump in. It just looked to dirty and as no one was in there I did not need to be the first.
He picked us up and we started by visiting the floating village, an hour away from the city. We went on a boat which took us to the floating village, were Vietnamese refugees would live on boat houses.
The next morning we got up a little later than usual. After leaving our room we recognized that this town and region was stunning. Desert and high volcanoes all around us. The place was superb.