A few years ago I signed up to this site and I immediately saw it's value. Since then, I've made pretty long lasting friendships and I've been able to send letters to everywhere in the world!
Global Penfriends is one of the best pen pal sites I have used. There are a lot of members, and generally people that I have contacted (or ones that have contacted me) are really nice and friendly. I've made at least two really good pen pals from this site! Hopefully I can make many more.