Mecca (Saudi Arabia).
Mecca is famous Islamic city situated in Saudi Arabia. The name of Ismail Alaih e Salam s/o Abraham known as Hazrat Ibrahim Alaih e Salam is popular in Islamic History. Both son and father are Prophets of Allah. Ibrahim A.S left his family only for Allah's will.
When Ibrahim A.S left his wife & kid (Ismail A.S) in desert of Saudi Arabia. There were no water, garden, roads even a building that time, when Ismail and his mother were alone. Ismail A.S was weeping, and all of a sudden Ab e zam zam (water) started to flow beneath of foot of kid, from that place where kid (Ismail A.S) weeping.Ismail A.S lived with his mother and after became young. Ibrahim A.S visited there step by step.
After sometimes, a village appeared at this place. After many years, it became a big city due to Holy Khana Kaaba. Now, highest buildings, hotels, restaurants, streets, roads, bridges, markets etc are the main places of Mecca city.
Presence of non-Muslim is not allowed in Mecca City as well as no murder also held that place as it is a place of peace.
There are many reasons to be called a place of peace.
The city in all over the world most recognized place where all Muslim feel a virtual peace by heart & soul. Every Muslim wants to be lived and died at sight place.
It is popular place on earth. Google Earth can show this place of city Makkah visibly. The buildings are being modified in Makkah City called great technology and natural peace in this city not ignore able. So, it is popular place of peace in all over world.