Ogof Nadolig

Ogof Nadolig
Lower entrance structure
Location	Alyn Gorge, Flintshire, Wales
OS grid	SJ 19036555
Coordinates	53°10′51″N 3°12′47″W / 53.18091°N 3.212961°W / 53.18091; -3.212961Coordinates: 53°10′51″N 3°12′47″W / 53.18091°N 3.212961°W / 53.18091; -3.212961
Length	300 metres (980 ft)
Discovery	North Wales Caving Club 1978
Geology	Limestone
Hazards	None
Access	Free
Translation	Christmas Cave (Welsh)
Cave survey	elevation
Registry	Cambrian Cave Registry

Ogof Nadolig is a cave in the Alyn Gorge near Cilcain, Flintshire, Wales. It is mostly crawling, 300 metres (980 ft) long, and ends with a shaft up to the surface and a locked manhole cover.

Nearby, but closer to the river, are the caves Ogof Hesp Alyn and Ogof Hen Ffynhonnau.

Its name derives from the fact that it was discovered on Christmas Day.