Geology

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

The explorer Captain Cook may have named it White Island, but the Maori call it Te Puia o Whakaari – The Dramatic Volcano.

A charmingly eccentric magma chaser presents his complete history of the island's eruptions since 1947, in cinematic form, just for you.

A county library in rural Ohio houses one of the finest mineral collections in the world.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Even Henry David Thoreau found this glacial pothole irresistible.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

A massive cross stands as the sole resident of this water-locked Crimean crag.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.