This one actually is real. It was shot in GA and was taken as it was about to be buried by the back-hoe. They have a problem with farrel pigs breeding with wild pigs getting these hybrid honkers that have really terrible meat to eat. Since they don't taste very hot, they usually kill them and bury them.

The problem with this one is that it was buried before any official measurement were made, so it is impossible to tell how big it actually was, but it was big!

http://www.snopes.com/photos/animals/hogzilla.asp