I was at a training class last week in Houston.  One day I happened to wear a t-shirt from Berlin, Germany, and one of my classmates asked me if I had gone there.  I told him no, that the shirt was a souvenir from my parents for watching their dog while they were in Europe.  I started to think about it and realized that I had gotten a similar shirt as a souvenir when I watched their dog while they were in Washington, D.C.  
I went home and started rifling through my closet and realized that I had a lot of shirts like this.  I had shirts from Vancouver, Canada; Banff, Canada; Athens, Greece; Paris, France; Mexico; Portugal; and China.  Not to mention the shirts from all over the United States.  Basically, whenever someone goes somewhere, they bring me back a t-shirt.  So, even though I may never travel to all of these places myself, I am traveling the world in t-shirts.