Link: independent.co.uk
A British artist tested the Royal Mail system by sending 130 postcards to herself, each with increasingly difficult puzzles, visual tricks and riddles providing her address. All but 10 successfully arrived at her house. Dear Postman, LOL, nuf siht t'nsI?
Link: independent.co.uk
I love the UK. I'm pretty sure that none of these would have gotten delivered in the US. In fact, they'd probably throw you in Guantanamo out of spite.
Tricky.
Easy.