3-mile hike to the beautiful Svartifoss (“Black Waterfall") known for its beautiful backdrop of black hexagonal basalt columns. Originating from the Svinafellsjokull glacier, the water plunges 80 feet over a cliff into a heart-shaped amphitheater surrounded by tall black basalt columns. It served as the inspiration for architect Guðjón Samúelsson’s design of Reykjavik’s Hallgrímskirkja, the largest church in Iceland.