One of the reasons I started an account at Postcrossing was to bring the world to my door. The idea of getting mail from around the world was very enticing. It's unlikely I'll ever travel outside the USA and it's even more unlikely I'll travel the around the world, but a postcard in my mail box from Germany, Ukraine, Australia, Malaysia, Russia, France, China, or Brazil, makes the world feel a smaller place. I have postcards from all across the world, over 160, so far.
The postcards can be anything the sender likes, but my listed preference are of landscape, costumes, crafts, birds, the sky, and something a little different, but used in many cultures, the umbrella.
I now have a little collection of umbrella postcards and another of birds. Many Postcrossers send pictures of their landscape, native costumes or crafts. Some send a postcard they find funny or poignant. Everyone writes a little something on the card--sometimes a lovely note, sometimes a simple greeting. Any postcard is a welcome sight in my mailbox.
When my postcard arrives at its distant destination my address is given to another Postcrosser somewhere else in the world. I never get a postcard back from the person who sent it, unless we agree upon an exchange or become pen pals. The point of Postcrossing is to connect the world on a small scale and with a postcard you start a chain reaction of kindness and connection, final destination unknown.