That’s a nasty pothole!
Gravel drives need some attention. They look fantastic when well maintained but can suffer very quickly if left unattended. This one is suffering from busy traffic and water ingress.
The constant wet spot and splashing of the puddle rinses the area of the fine materials and this then allows the granular material to be flushed away, resulting in a huge hole.
The remedy, gravel grids, an interlocking plastic cell which prevents the traffic beating down on the wet spot and causing migration of the stone.
Resulting in a compact and stable surface allowing vehicle/pedestrian access without the costly damage occurring to both driveway and vehicles.