The Incan citadel of Machu Picchu is an incredible sight - even on a gloomy and rainy day. Like
many other creations of the Incas, it's hard to imagine how it was possible to build something
this amazing back in the 15th century. How can this still be standing in all of its glory hundreds
of years later? More recent structures built with much more "technology" can't seem to stand
the test of time like Machu Picchu has!
The Wordy Explorers