404 is a broken link on your website. And since we all get it sometimes, due to the server problems or the improper linkage, there's no reason we should not treat it, design it and still keep our site visitors interested in going back to what it is they were looking to find.
WHY IS IT CALLED 404?
'In 2008, a study carried out by the telecommunications arm of the Post Office found that "404" had become a slang synonym for "clueless" in the United Kingdom. Slang lexicographer Jonathon Green said that "404" as a slang term had been driven by the "influence of technology" and young people, but at the time, such usage was relatively confined to London and other urban areas.' - Thanks Wikipedia!
Here are some nicely designed 404 pages we got in our inspiration library. Enjoy!