Hajj is an annual Islamic pilgrimage to Mecca and nearby places. Every Muslim is expected to complete the Hajj at least once in their lifetime if they can do so, provided they are physically and financially capable of undertaking the journey. Many Muslims save their entire lives to be able to make the pilgrimage. It is one of the five pillars of Islam. It is a religious duty that must be carried out by every able-bodied adult Muslim who can afford to do so. Hajj is also one of the largest annual gatherings of people in the world. Instead of many years, people have traveled to Mecca to make the Hajj pilgrimage. Adam, peace be upon him, undertook the first Hajj. The inhabitants of Mecca and the surrounding region eventually accepted and were among the first to observe Hajj.