Arbaeen pilgrims on foot in the mud

Arbaeen is the most significant number of people fed for free and the largest group of volunteers serving a single event in the world. Up to 25 million pilgrims take the 75km journey from Najaf to Imam Hussain’s shrine in Karbala, Iraq while some walk 700km from Basra in Southern Iraq. The pilgrimage, also known as Ziara is optional and usually commemorated by Shia Muslims.