I think there are many reasons why we go on pilgrimage, some with the intention to visit the holy places in order to get the energy, being inspire and do some prayers over there to generate some merit and purify negative karma. For some just want to company their friend or family member but no nothing about it, some just want to go to discover and experience it and some just a pure sightseeing.
I was very fortunate to go to Bodhgaya, the site of Buddha's enlightenment with my teacher. He taught us what we should think and do during we were there. He gave us a teaching, we did a group prayer, meditation, circumambulate around the stupa, did prostration, made candle offering, made fruit and flower offering and a new set of robe to Buddha statue in Bodhgaya etc. There was a very meaningful trip for me as i understood more about Buddha and the effort, patience etc he put into the practice in order to gain enlightenment to benefit others and I believed that from this trip I had purify some of my negative karmas and collect some more merit too.
Here is the Purpose of Going on a Pilgrimage - by Shangpa Rinpoche 4th October 2009
http://www.shangpa.org/teachings/WhyWeShouldGoOnPilgrimage.pdfAs a Buddhist, we should perform wholesome actions and think wholesome and bene?cial thoughts. One wholesome thought and action is to plan for and go for a pilgrimage. Buddha Shakyamuni said that after he entered parinirvana, all the places he has visited to give teachings and performed special retreats should be visited by followers. By visiting, they would get inspiration for practice, remember Buddha?s teachings and do re?ection on their own practice.
There are actually 3 categories of pilgrimages.
1st is when one feels bored with where one?s staying and want to refresh oneself by ?nding a special place to relax in. One is like a tourist. It does help to visit holy places as these places have blessings and special energy. You will feel joy when you are there. However, this is not the best type of pilgrimage.
The 2nd category is when one knows the Dharma and wants to clear one?s obstacles and believe that visiting holy places can clear one?s obstacles and increase one?s fortune.
The last is pilgrimage without worldly attachment, to simply go to holy places to be inspired to follow in the ways of the Buddhas and Bodhisattvas. This is the best type of pilgrimage. Even though the 1st and 2nd categories are not the best, still the pilgrimage will be meaningful to us. If you take an arduous journey without knowing the meaning of going on a pilgrimage, only to see a few rocks or a pool of water at the end, you may feel frustrated. But if you have the right purpose and know the meaning of going on a pilgrimage, you know that it represents that the quality of enlightenment is already there for us to realize.
Going on a pilgrimage is also a kind of puri?cation, one with the suffering of sickness and discomfort. We try every means to purify our karma, if we can successfully overcome hardship encountered during the process of going on a pilgrimage, that is de?nitely puri?cation.