⟪⟪ Ultraviolet induced visible fluorescence - water & ice ⟫⟫
I don't really know what causes the glow in the water in the photos below, but I have found it to appear in all naturally occuring water.
[ normal || UVIVF ] ⇛ (2017-09-27)
[ normal || UVIVF ] ⇛ A small waterfall (2017-11-04)
[ normal || UVIVF ] ⇛ A stream (2017-11-04)
[ normal || UVIVF ] ⇛ A stream (2017-11-04)
[ normal || UVIVF ] ⇛ Feather frost. Ice does not contain any substances that emit visible light when activated by UV light. Therefore it shows up as dark on the photo, while being bright white in normal light (2017-11-04)