Words cannot describe the vehement frustration felt when reaching a 404 page. Sometimes the website just has a broken link and other times the user is at fault. But regardless of fault the 404 error page is unbecoming to even the most well-designed sites. The best way to spruce this up is by adding a lighthearted effect into the design.
For this post I've organized a collection of unique 404 error page designs. Many of them utilize humor as a good-hearted gesture for comedic relief. Other designs are more pragmatic offering related links and possible solutions for finding the missing page. Your choice of 404 style really depends on the type of website. Just keep in mind that frustration is best handled with a cool & collected mentality. The best 404 pages try to solve the problem by offering solutions instead of a dead-end street.