What is Postcrossing?
It’s a project that allows anyone to receive postcards (real ones, not electronic) from random places in the world. Learn more.
How does it work?
Request an address and a Postcard ID
Mail the postcard to that address
Receive a postcard from another postcrosser!
Register the Postcard ID you have received
Go to number 1 to receive more postcards!
Website: http://www.postcrossing.com