Objections have been raised over the proposed location of a memorial to Bomber Command in Lincoln.
The Lord Lieutenant of Lincolnshire, Tony Worth, has said a monument could be put on a ridge on Lincoln's South Common.
Both the common and nearby cathedral were landmarks for crews returning from occupied Europe in World War II.
People managing the common, although backing the memorial, said the site had poor access and protected status
Lincolnshire was home to dozens of wartime airfields which launched thousands of missions.
Despite suffering 55,000 casualties, the service was denied its own campaign medal at the end of the war.
John Shipton, of the Commons Advisory Panel, said: "Access is the problem. It is an isolated spot, vulnerable to vandalism and without a proper footpath.
"A lot of the people who would want to see it are old and would need good access."
He added the three commons of Lincoln were protected from development by law.
"If we allow the memorial to be built there is a concern it could open the way for other building, such as roads."
He added that moves to create a memorial at a RAF base had not made any progress.
Currently the only permanent tribute to Bomber Command in the county is a plaque in Lincoln Cathedral.