I've sent and received close to 800 postcards from around the world through Postcrossing.com (a wonderful free site), and here are the first 8 cards that arrived in my mailbox.
The longest traveled card was from Malaysia and it traveled 9,555 miles and took 24 days to arrive.
I'm a stamp geek and I also added (copies) of the stamps that came with some of the cards.
I think it's easy to figure out which came with which.
How many of the cities have you visited or how many stamps have you seen?