From experience:
Go and watch one of the many traditional Japanese festivals, they range from the super cute to the absolutely insane but are always fun.
Deliver humanitarian aid to a war zone, nothing beats the adrenaline rush or the feel good factor.
Visit Angkor and see how incredible human achievement can be.
New year in Thailand, trust me this holds some surprises.
Eat a snake in Vietnam, Live octopus in Korea and Sushi in Japan.
Watch the world recreate itself at the head of a lava flow.
Go watch Bach's works be performed in Vienna.
Visit a country you hate/have a dislike for, we all have one but meeting the people of a country will often clear your head as to what's really wrong there. Iran and America aren't all that bad
this turns up a lot in english lists odd that
Learn another language. I heartily agree if you haven't already do so. The whole world shouldn't have to learn to speak with you.
I'd like to do:
Take a parabolic flight,
Rio Carnival,
Learn to fly,
Drive the Silk Road,
Write that damn Novel, Play or Script,
See the Kumbh Mela,
Visit Mongolia and Bhutan,
Learn to Sail.
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I take it all back. FFFFFFUUUUUU cardboard!!!!!