Postcards from far away
Postcards are probably the most purchased as souvenirs. They are often used for their intended purpose being sent all over the world but they are also collected as pictorials of a trip Being extremely useful for those that don't own or have access to their camera.
Image: © Gareth Weeks/ Stock.xchng
Some collect post cards of their trip. If you feel that you have a particular skill you can even make your own postcards. There are many sites that can help you do this, of course if you only want to email them you could even produce them for free. Just by choosing a favorite image and then share them via email or even social networking sites.
You may even get your masterpiece shared to an even larger audience.