What’s going on with the almost fluorescent green hue the water takes on sometimes? The ‘greenness’ of the waterfall fluctuates with the seasons, but Reddit user wopwopdoowop captured a particularly ...

These falls, known as foss in Icelandic, range in volume from the most powerful waterfall in Europe, Dettifoss, to those that plunge into swirling blue-green pools, cascade down black basalt ...