Translation of rub in Spanish

One hour later people were starting to leave and we did not exactly understand why. We took another drink and I paid the bar man cash. Later it turned out that the change he gave me would be fake money.
It must have taken them years and ten's of thousands of workers to accomplish the tasks of constructing such spectacular compounds. We took many pictures and walked back to the taxi.
A band was playing Peruvian music while we were waiting for our luggage. The altitude is immediately felt: Dark blue skies and thin air, which won't let you climb stairs without having to take a few breaks.