2. The Loch Ness Monster

This sea creature supposedly inhabits the waters of Loch Ness in the Scottish Highlands. Although substantial evidence has never been obtained, there is one controversial photo from 1934 that depicts a dinosaur-like creature swimming in the murky body of water. Since the early '30s, there have been at least six alleged sightings of the Loch Ness Monster, affectionately named "Nessie". Some people believe that the animal is a descendant of the marine reptile plesiosaurus while others say that the idea of the monster derives from wishful thinking and planned hoaxes.