Geology

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

One of the last active volcanoes on the Eastern seaboard.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

A turquoise lake within a volcanic crater.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

A local scoured more than 1,000 acres for stone to create his masterpiece.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

Réunion Island's highest point is a two-million-year-old volcano and a paraglider's paradise.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

After suggesting criminals be burned to death on this rock, a king's advisor suffered his own punishment.

The largest source of fossilized insects anywhere.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

The only diamond mine in the world where you can keep what you find.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.