Muslims go to mecca to wash there sins away
Non Muslims don't go on Hajj.
They Muslims to go the city of Mecca to perform Hajj. But they must go to Mina and Arafat to complete the rituals of Hajj.
Hajj is important to Muslims because it is our god's home and we pray there. Also we do religious things that we have to do.
Muslims usually perform Hajj once in their life to get the Blessings of Allah.
The Muslims go for hajj in Zil Hajja. It is the last month of Islamic calendar. Hajj is performed during 8th to 13th of Zil Hajja.
they go Meccah
Hajj is important to Muslims because it is in the 5 pillars of Islam. It is the 5th pillar. Also you must go to hajj, since Allah has commanded the people of Islam to go there; give charity(250$) to poor people; and do prayers. You will have to go to hajj at least once or more in your entire life. Hajj is one of the most important things after the Qur'aan.
Muslims perform Hajj in the Holy city Makkah and Madina in Saudi Arabia.