This episode is brought to you by Unexplained Mysteries, a Parcast Original. For more episodes like this one, subscribe to Unexplained Mysteries, free on Spotify!  The Loch Ness Monster, aka Nessie, is believed to patrol the depths of Loch Ness, a large freshwater lake deep in the Scottish Highlands. Since a now-famous sighting in the 1930s, the Loch Ness monster has captured people’s imaginations across the planet. But Nessie’s story could date back as far as 500 A.D.