Scotland’s Loch Ness monster was first written about in Adamnan’s Life of Columba, in which the missionary described how St. Columba persuaded a fierce sea creature to close its jaws and go in peace instead of devouring a fellow monk.
The first newspaper account of a sighting of the monster was not until 1933,when the Inverness Courier published a sighting, followed closely by several more sightings. There was such great excitement that policemen were positioned around Loch Ness to prevent anyone harming the creature should it make an appearance.
Scientists have theorized that the Loch Ness monster (nicknamed Nessie in the 1950s) is a cryptid or comes from long-surviving plesiosaurs and similar to other supposed lake monsters elsewhere, though its description apparently varies from one account to the next. It has even been described as a vastly englarged, long-necked marine form of the common newt.
Since 1933 there have been many stories of sightings and I seriously doubt that many people had the tourist industry in mind when they described what they had seen. There has been minimal photographic evidence and most of all of it has been contrived.
The scientific community regards Nessie has a modern-day myth and dismiss the sightings as hoaxes or wishful thinking. The waters on Loch Ness often form strange patters from the currents and (from personal experience) I think if you look at the long enough you could believe that you could see something moving on the surface.
In spite of all the hoaxes or wishful thinking, Nessie remains one of the most interesting examples of examples of cryptozoology.
If you’d like to read more about it Wikepedia has a great write up.
You can also visit Tony Harmsworth’s wonderful Loch Ness Information Web site. I hope you enjoy it as much as I did.