Pilgrimage Hajj is fifth pillar of Islam. It is a religious journey to the city of Makkah during the Lunar month of Zul-Hijjah . It is obligatory upon the the one who can afford the expenses.
There are three things Fard in Hajj:
2) Stay in Arafaat
Pilgrimage Hajj wipes out sins of a Muslim and makes him to be as pure as new borne.