Translation of fruitful in Spanish

I guess you know Spanish very well. I'm not on line most of the time. I think to get accommodation in the city is hard. I have many friends in Madrid, they all live outside the city. I think we can help each other to practice German or Spanish.
We were not the only tourists, there were a many boats sailing on the same route. At one point the driver stopped the boat and immediately children of the village people approached us.
In the late afternoon we took a taxi back to Cusco, which we shared with a nice Spanish couple. My wife who was mainly concerned with our sleeping conditions took the address of their hotel.