As I promised in last week,today I'm going to tell you about Sigiriya ,the 8th wonder of the world..Actually I will have to publish a book to tell you everything about Sigiriya.But I'll do my best..I spent past few days reading books about Sigiriya,and checked information I gathered from a museum because I want to give you accurate information.Sigiriya is a rock fortress situated in Sri Lanka. So now why this is considered as the 8th wonder of the world? As I said in my previous post(click HERE to read it) it is because the technology used in Sigiriya is still a question mark for many scientists around the world.The magnificent hydraulic systems and the technology used to make a huge fortress on a a huge rock.I have to tell something about this rock first.This is called Sigiriya (lion rock) because of a huge creation of a lion on the rock(today we can only see his paws) .Sigiri rock has a history of 25-18 millions of years .So it belongs to pre-Cambrian era according to t