Why are there so few old buildings in a city that is 2800 years old? How was it possible to keep both Mosque and Christian church in great condition on one small area?How could there be a district of an ancient , isolated city in the middle of a modern one? What is that magical stone that is soft as a clay when mined and becomes harder and harder with time? How was it possible to create an amazing system/chain of beautiful buildings made by different people and at different ages? What is hidden under the Republic Square? What tricks did the government use to built a metro? These and many more interesting questions will be opened up for you during our interesting tour in the pink city of Yerevan.