The most important Islamic places for Muslims are Mecca where the holy Kaaba Exist & Madina where last Prophet Hazrat Muhammad (Peace be upon him) migrated from Mecca. The other site where many Prophets lived is the city of Jerusalem where Masjid Al Aqsa exist. There are many other places around the world where many Prophets & Sahabas lived which includes Iraq, Iran, Syria, Yemen, China, Turkey, Africa & other places because the foundation of Islam & Muslim was laid by Allah the Almighty by sending Prophets & giving them book & sahifay & it starts from Hazrat Adam A.s. & the process of wahi & sending of Prophets ends on Hazrat Muhammad (Peace be upon him).