This collection of basalt columns was recorded in a canyon north of Molokai, at a depth of just over a mile, according to Nautilus Live Ocean Exploration Trust. YouTube video screengrab Newly recorded ...

Stuðlagil Canyon, Iceland features rare hexagonal basalt formations along the river. The rocks fractured naturally as lava ...

Huge, dark pillars of stone rise from the dirt. They are perfectly hexagonal. They stand shoulder-to-shoulder like a terracotta army of frozen lava. They look like someone perfectly sculpted them, but ...

Newly recorded video captured the clearest images yet of a “geologic wonder” off Hawaii that resembles the skyline of an abandoned seafloor metropolis. The surreal collection of shapes — each around ...