This is pretty cool from Seth’s Blog:
On a deserted beach on a small island near the equator, there’s a barrel and some ziploc bags. This post office has been here for more than a hundred years. It was built by whalers who needed a way to get letters home to England. The idea was that the last stop you would make on your way home was to the post office. You’d pick up whatever letters were there and bring them back to England.