Translation of massif in Spanish

When we landed in Ho Chi Minh city I immediately perceived that the building, houses and structures in the airport had a Russian or a communist influence: large, concrete, grey buildings all over.
There were too many of these children and they were determined to sell us a can of Coca Cola. All means were legitimate, even shaking our boat, so that we would be scared of falling into the water.
The border control was in the middle of the Andes mountains, at an elevation of around 2000 meters above sea level. The forest around us was covered with snow and the scenery was breathtaking.