towering wall a hexagonal basalt columns

canyonnnstulagil canyonstulagil breathtaking photographed wondernnthe contrasting captivating observation geological formations hydropower juxtaposed atmosphere landscapes hexagonal millennia precision centuries submerged krahnjkar revealing turquoise geometric locations testament formation stonewall undefined towering stulagil renowned striking volcanic activity powerful dramatic remained icelands tranquil visitors enduring columns located iceland created ancient beneath intense emerged reduced natural vibrant canyons islands origins geology terrain bedrock basalt canyon