Gullfoss has its origin in a glacier lake about 40km north of Gullfoss in Lángjökull glacier.
Sigríður Tómasdóttir, the daughter of Tómas Tómasson who owned the waterfall in the first half of the 20th century lived at a farm nearby and loved Gullfoss, so much so that she protested very strongly against foreign investors who wanted to build a hydroelectric powerplant and which would have changed and destroyed Gullfoss forever. She was the one that protested so intensely against these plans, even going as far as to threaten to throw herself into Gullfoss and kill herself. As a result powerplant at Gullfoss was never built.
It's, therefore, thanks to her that Gullfoss remains the beautiful, uplifting and impressive experience it remains today.