An Indian pilgrimage will take you to some of the most iconic locations and structures known to humanity. You will visit the very spot where the Buddha attained enlightenment, as well as the stupa where his bones are still buried.
People enjoy gambling the world over, there are big gambling cultures in Asia, America, Europe, and elsewhere.
A volunteer holiday usually means going to an underprivileged area and bringing value to the community there. You could help out with teaching children English or life skills, or work with exotic animals that are under threat.