Muslim pilgrims visit Mount Thor in the holy city of Mecca ahead of the annual haj pilgrimage September 19, 2015. Mount Thor marks the start of the journey of the Prophet Mohammad and his companion Abu Bakr Al-Sadeeq from Mecca to Medina. It houses Thor cave where Prophet Mohammed is believed to have hid from the people of Quraish before his Hijra (migration) to Medina. (Photo by Ahmad Masood/Reuters)
