It was straight out of an Earth Science video that I probably slept through in high school: Flowing red hot lava from the volcano Kilauea on the big island of Hawaii. Lava flows from the eruption under the surface through lava tubes down to the ocean where, as it hits the water, hardens into large black rocks that shape the coastline of the island. The ocean water close to the lava was more than 95 degrees! It was really wild!
We had planned on trying to hike out to it but that didn’t end up working out so we took a boat instead. I think the only other place you can see flowing lava in the world is Guatemala, but from what I’ve heard it doesn’t move this quickly. It was really unbelievable!