Translation of narwhal 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.
The trip was coming to an end. We were driving to the airport knowing that we had to fly 12-hour to Spain, than a break in Spain for of around 6 hours and than the rest 4 hours, a total of 22 hours.
Lunch was given at a family-run restaurant back in the valley. The headaches disappeared once were were back at 2000 meters. From there we continued to the Salar, a salt lake, mostly arid.