If you are looking to an engaging way to introduce the importance of Information Literacy and Critical Thinking to students, these links might help. Lynne Powell at Coyote Creek uses them to generate discussion around such issues as authority, trustworthiness and fact-checking.
Here are the links:
Tree octopus - the site looks plausible, but can we find info on this animal elsewhere?
House hippo - even "video evidence" can be misleading (stop at 0:45 and ask for impressions.)
Extinct tiger photo - does finding a picture online mean it's true?
Giant tomatoes - strange camera angles can create a false impression
Amazing Iceberg - photoshop changes everything
Shark attacks helicopter - where can you check for hoaxes?