Translation of nationalism in Spanish

The airport was huge, compared to Siem Reap's one, of course. We expected something similar to Bangkok's airfield but it was completely different. We stood in line for the passport control.
A year later we decided to make another trip. We have both been to Mexico and to Cuba, and the year before we were in South America, where we have visited several countries for five weeks.
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.