Translation of retain in Spanish

I was never there but I heard that the night life is very exiting. I am going to Amsterdam next year with my uncle. He will return to his house where he was born. I think to come to germany next year but I don have any idea
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.
We were a little sad that we had to leave Peru so soon, but we had to take the 7.30 bus which would take us to the Chilean border. Chile and Argentina were still the main destinations of our trip.