An amazing and often overlooked fact about Loch Ness is its staggering volume: it contains more fresh water than all the lakes, reservoirs, and rivers in England and Wales combined. Despite not being the largest loch by surface area (that's Loch Lomond) or the deepest (that's Loch Morar), its sheer depth—averaging 132 meters and reaching 230 meters—allows it to hold approximately 7.4 cubic kilometers of water. This immense volume means the loch never freezes, even in the harshest Scottish winters. When the surface water nears freezing, it becomes denser and sinks, being replaced by warmer water from the depths. On extremely cold days, this temperature differential causes steam to rise from the surface, creating a ghostly, atmospheric mist that has fueled "Nessie" legends for centuries. Additionally, the water is exceptionally dark and murky due to high levels of peat washed in from the surrounding hills, making it nearly impossible for divers to see more than a few feet in front of them.