Morsárfoss

Morsárfoss is a waterfall in Vatnajökull National Park, Iceland. Measurements showed that one of the several waterfalls in the area is at least in total height, making it the tallest waterfall in Iceland. Morsárfoss became visible in 2007 when Morsárjökull, an outlet glacier of Vatnajökull glacier, started melting.
''the name is composed of -foss meaning waterfall, -ár, genetive of á meaning river, but the stem syllable is of obscure and uncertain origin with speculations that it mey imply darkness of the river or in some maner a stoney river''