Translation of sultry in German

I am Spanish Teacher. I graduated last year, in August. I studied mostly in Germany. I have been working for nine months as a teacher in many language schools but soon I will be a student again.
Tam Coc was a place where the river ran through different limestone mountains. The view was amazing. However, the two hundred other boats on the river really destroyed the atmosphere.
The next day we decided to spend on the other side of the mountain range (antiplano), in Bolivia. We didn't have the courage to drive deep into Bolivia, as everyone told us about the bad infrastructure and condition there.