I think the majority of people who use the web every day don't know how a website hosted on a server that would be as far away as on the other side of the world physically gets transported to their computer. and even if you do you'll probably still learn something from this TED Talk.

When a squirrel chewed through a cable and knocked him offline, journalist Andrew Blum started wondering what the Internet was really made of. So he set out to go see it -- the underwater cables, secret switches and other physical bits that make up the net.