Ancient Scottish legend told of a "beast" that lived in the waters of Loch Ness. St. Columba, for instance, was supposed to have encountered a large serpent in the River Ness over 1400 years ago. But the modern history of Nessie began in 1933 when a new road was completed along the northern shore of the Loch, providing easy access to unobstructed views of the water. Soon after this, a couple spotted an "enormous animal" in the Loch. The Inverness Courier wrote up their sighting, describing what they saw as a "monster;" intense media interest followed; and thus was born the modern Loch Ness Monster.
Since 1933 Nessie sightings have been reported quite regularly. There are three possible explanations for these reports: 1) Nessie really does exist, and the sightings are evidence of this; 2) People overly eager to believe the legend are interpreting any unusual movement or shape in the water as Nessie; and 3) people are lying about what they've seen.
The first explanation (Nessie's real) is extremely unlikely, but the staff of the Museum of Hoaxes has a soft spot for Nessie, so we're unwilling to completely rule this out. But common sense would dictate that the second explanation (misinterpretation) probably accounts for the majority of the sightings, and the third explanation (deliberate lying) accounts for the rest. Collected below are some of the most notorious Nessie hoaxes (suspected and known).