As far as I know there is a military (army)base near Kos-City. But.......I visited it back in 2000, so don't know the current situation.
I discovered the place during a bike ride.
When I drove by there were a CH-47 and a UH-1H parked , as you can see now Google shows only a CH-47.
The place is located near a small public road and this road will bring you uphill.
Let the pictures talk ;
The red circle shows the distance from Kos-City, and it are the only orange roofs in the neighbourhood.
This picture only shows a CH-47
Rgds,
Kier