Hiked Mt. Kilimanjaro last year.
Crossed the arctic circle and tried to see aurora borealis.
Volunteered at an organic farm in Hawaii for few weeks (WWOOFing).
Took a train to Chicago and Seattle from the bay area.
Hinged on a ferry to Alaska and walked on a frozen lake.
Ran the SF half marathon (walked the last 2 miles).
Went on a cross-country camping trek and wilderness adventure.
Traveled in southeast Asia and East Africa.
Prefer public/mass transportation.