The religious journey to Makkah, Hajj is the highest form of worshipping that involves physical, financial, and spiritual actions. It purifies the pilgrim from sins just like a newborn.
Hajj is the jihad of women, children and old people as it was said by the Holy Prophet (PBUH). It removes our sins. And to perform hajj is the dream of every Muslim, but it is done when Allah calls his people.
More Info: How To Perform Hajj