404 is a common thing and occurs on any website now and then. Your visitor may have typed an URL wrong or a once active link is no more. A useful 404 not only informs the user about that error but also tries to keep him on the page.
Designing these 404 error pages is not what any designer loves to do. Still, there are a few sites that have 404 jewels to show. We’ve searched for these jewels to help you with your inspiration.