With the Icarus as the center piece.
It is a giant subterranean hanger (with ceiling lights) that harbours a fleet of ships and planes found in Flight of Icarus (or as many say guns of icarus original). Creating a maze/grid-like like map with many nooks and crannies and gaps made by missing ships.
I say the size would be about as big as either duels or canyons (if the game can handle all the assets).
Because it is indoors, there is only hard cover and no clouds.
All the ships are held in place by giant girders and beams with docking bays that attaches the ships into walkways. Some of them have collapsed to make way for ships to move.
Ideal for mobile ships like squids but still has a few open spaces that can be used by galleons.
Spots are made and easily shaken.
each little docking bay i imagine looks like this. With ships suspended and latched into place by claws that hold them there. But from below instead of above like a ship in a bottle.
and pretty much arranged row by row like so.