Aire Head

A spring that is apparently the source of the Aire river?  
"As the name suggests, Aire Head Springs is the "official" rising of the River Aire, where the waters from Malham Tarn (which disappear mysteriously underground at Water Sinks) resurface before joining Malham Beck near Airton just to the south of Malham in Malhamdale."

Though on the ground Malham Beck from Malham Cove in the background and Gordale Beck seem to put a lot more water into the river.