Words can not describe this place, but I will try. The Big Island is built atop 3 main volcanic summits. Mauna Kea is the tallest mountain on Earth when measured from its base. Mauna Loa and Kilauea have both been recently active. All three are shield volcanoes similiar to those on Venus and Mars.
The huge main caldera of Kilauea is stable enough to hike inside. The smaller Halemaumau Crater within is considered the home of Madame Pele, and is still hot. The most recent eruption come from the Pu'u O'o vent. Lava from this vent travels in subsurface tubes to reach the sea. Our Big Island is getting bigger each day!
The volcanoes which created Hawaii are intimately connected with physics and cosmology. The source of Eath's core heat is a tiny singularity, no bigger than a grain of sand but weighing as much as a moon. It is far too tiny to suck us up, and in fact eats no more mass than a typical human. That small amount, converted into radiation, has kept Earth's core hot for billions of years.
Old books told us that the heat comes from "radioactive decay." The evidence against that is all around me. Hawaiian soil is red, indicating a high iron content. The islands slowly travel across a "hot spot" originating near the core-mantle boundary 3600 km below. The iron-rich Hawaiian lava originates near the core, for the mantle contains almost no iron.
Earth's core has a temperature in thousands of degrees, hot enough to melt rock. If you go into the field and find the most radioactive samples you can find, they are not about to melt. Those samples come from the crust, which is richer in radioactive elements than either mantle or core. The concentration or radioactive elements is too sparse to melt rock.
The only way to melt those rocks is in a chain reaction. That occurs very rarely, as in the Oklo uranium mine or when humans build a reactor. The most common radioactive elements, like Potassium 40, would have decayed by now. The old hypothesis of radioactive decay simply does not hold water. A small singularity would keep the core hot indefinitely.
Presence of a singularity also explains Earth's magnetic field, and why that field is independent of the geographic poles. The singularity also explains how Earth and other bodies coalesced from a promordial cloud of gas. Particles of the infant solar system were far too tiny to assemble themselves into protoplanets. Earth formed around a tiny singularity as a pearl forms around a grain of sand.
Pearls, volcanoes, telescopes, coral reefs and cosmology are all connected. The Big Island is a fascinating place.