Well done Karen! A few corrections for you below.

My vacations (The word "vacation" is normally used in American English, "holiday" is normally used in England) in Machu Picchu

For my last vacations i travelled to Cusco because I wanted went to visit Machu Picchu. It is an amazing place and I really love it. The only problem was almost I can´t found it hard to breathe because Cusco is very high. and for me was difficult to breathe. But However the sky the view of the sky all is very wonderful. When I saw Machu Picchu I thought it was incredible because you can't explain how the old Peruvians "The Incas" made such constructions in a very hard to reach place. And The architecture is very good and beautiful. I promise I will return there.