Svartifoss, also known as the "black waterfall," is a popular sight in Skaftafell in Vatnajökull National Park, Iceland. Surrounded by dark lava columns, this 20-meter waterfall stands out for its unique rock formations. The sharp rocks at the base of Svartifoss are constantly being shaped by the falling water, creating a stunning natural spectacle that has inspired Icelandic architects and can be seen in iconic buildings like the Hallgrímskirkja church in Reykjavík.