During my “Silk Route” journey in 2012 I travelled through Iran and of course the route Alexander the Great took to Persepolis the ancient City of Persia. Now in ruins, this UNESCO World Heritage is one that you really need to see to understand and get a feel of. The area of the site is vast and seems to just keep going and going. It is pretty amazing to walk around and imagine how it would have looked in the 4th century.