This four-day walking tour will take you on amazing     1     through the Andes Mountains on the way to the city of Machu Picchu. After     2     your destination, you will have a day to explore and be amazed     3     this ancient city.     4     amazing is the Incas’ dry stone method of building. Inca builders cut stones to exact sizes so that nothing was needed to hold walls together other     5     the perfect fit of the stones.

Perhaps the most extraordinary building of the nineteenth century was the Crystal Palace,     1     was built in Hyde Park for the Great Exhibition of 1851. The Crystal Palace was different from all other buildings in the world,     2     it was made of iron and glass. It was one of the     3     buildings of all time and a lot of people from many countries came to see it. A great many     4     were sent to the exhibition from     5     parts of the world. There was also     6     great deal of machinery on display. The most wonderful piece of machinery on show was Nasmyth’s steam hammer. Though in those days, travelling was not as easy as it is today, steam boats     7    thousands of visitors across the Channel from Europe.     8     arriving in England, they were taken to the Crystal Palace by train. There were six million visitors in all, and the profits from the exhibition     9     to build museums and colleges. Later, the Crystal Palace was moved to South London. It     10     one of the most famous buildings in the world until it was burnt down in 1936.