World Heritage status is being sought from the United Nations for Loch Ness and the Great Glen.
An adventure racing competitor swims Loch Ness
Destination Loch Ness, a group made up of businesses associated with the area, will make an application to Unesco for the designation.
There are already bids from Scotland for the internationally-recognised protection to be given to the Antonine Wall and Culloden Battlefield.
In the UK, Stonehenge, St Kilda and the Giant's Causeway have the status.
World Heritage status aims to identify, protect and preserve places considered to be of "outstanding value to humanity"
Walkers can trek the length of the Great Glen by following a 73 mile (117km) route, which can take five to six days to complete
The oldest sighting of a monster near the loch is reputed to have been made by St Columba in AD565
Destination Loch Ness believes its bid fits four of the 10 criteria set by Unesco to qualify.
Categories include that it is an outstanding example of land-use, is of exceptional natural beauty and represents major stages of earth's history.
Robbie Bremner, of the bid group, said: "I think it's got a great chance of becoming reality.
"We have got all the major private businesses and tourism businesses involved with Loch Ness heavily backing this project with their own money."
He said Historic Scotland, which owns the ruins of Urquhart Castle overlooking the loch, and other public bodies were also supporting the bid.
Mr Bremner added: "I think it's very realistic opportunity for Loch Ness.
"I don't see why we cannot achieve it."
Significant land-use in the Great Glen includes the Caledonian Canal, above, built between 1803 and 1822
The Great Glen is a geological fault line
Interesting fauna include Slavonian grebe which first nested in Scotland near Loch Ness in 1909
If successful, Loch Ness and the Great Glen site would also join the Great Wall of China, Pyramids of Egypt and Australia's Great Barrier Reef on the list.
The loch is renowned around the world for unexplained sightings in its waters, which some believe to be a monster.
This week, it has been a stage in the Wilderness ARC - 2007 Adventure Racing Championship and competitors had to swim part of the loch.
The other Scottish bids are for Culloden, the site of the last battle on British soil and the Roman-built Antonine Wall.
The wall, which runs 37 miles (59km) from Bo'ness, near Falkirk, to Old Kilpatrick in West Dunbartonshire, was nominated for the classification in January.