Svartifoss, also known as the "black waterfall," is a popular sight in Vatnajökull National Park in Iceland. Surrounded by dark lava columns, this 20-meter high waterfall is famous for its sharp rocks at the base. The unique hexagonal column sections of the basalt rocks have inspired Icelandic architects and can be seen in buildings like the Hallgrímskirkja church in Reykjavík. It's a must-see spot for nature lovers and architecture enthusiasts alike!